Creating an organization to setup Control Tower

I'm reading AWS documentation to launch a Control Tower's landing zone using CloudFormation. I want to do on an existing organization with multiple accounts and the template below has to be deployed as a prerequisite.

My question is about the resource MyOrganization. I have an organization already, so I guess AWS Organizations is already enabled and the resource MyOrganization wouldn't be needed actually, would it? What should I expect to happen if I try to deploy this template after removing resource MyOrganization? May accounts logging and security be created successfully?

Parameters:
  LoggingAccountEmail:
    Type: String
    Description: The email Id for centralized logging account
  LoggingAccountName:
    Type: String
    Description: Name for centralized logging account
  SecurityAccountEmail:
    Type: String
    Description: The email Id for security roles account
  SecurityAccountName:
    Type: String
    Description: Name for security roles account
Resources:
  MyOrganization:
    Type: 'AWS::Organizations::Organization'
    Properties:
      FeatureSet: ALL
  LoggingAccount:
    Type: 'AWS::Organizations::Account'
    Properties:
      AccountName: !Ref LoggingAccountName
      Email: !Ref LoggingAccountEmail
  SecurityAccount:
    Type: 'AWS::Organizations::Account'
    Properties:
      AccountName: !Ref SecurityAccountName
      Email: !Ref SecurityAccountEmail
  AWSControlTowerAdmin:
    Type: 'AWS::IAM::Role'
    Properties:
      RoleName: AWSControlTowerAdmin
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Principal:
              Service: controltower.amazonaws.com
            Action: 'sts:AssumeRole'
      Path: '/service-role/'
      ManagedPolicyArns:
        - !Sub >-
          arn:${AWS::Partition}:iam::aws:policy/service-role/AWSControlTowerServiceRolePolicy
  AWSControlTowerAdminPolicy:
    Type: 'AWS::IAM::Policy'
    Properties:
      PolicyName: AWSControlTowerAdminPolicy
      PolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Action: 'ec2:DescribeAvailabilityZones'
            Resource: '*'
      Roles:
        - !Ref AWSControlTowerAdmin
  AWSControlTowerCloudTrailRole:
    Type: 'AWS::IAM::Role'
    Properties:
      RoleName: AWSControlTowerCloudTrailRole
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Principal:
              Service: cloudtrail.amazonaws.com
            Action: 'sts:AssumeRole'
      Path: '/service-role/'
  AWSControlTowerCloudTrailRolePolicy:
    Type: 'AWS::IAM::Policy'
    Properties:
      PolicyName: AWSControlTowerCloudTrailRolePolicy
      PolicyDocument:
        Version: 2012-10-17
        Statement:
          - Action:
              - 'logs:CreateLogStream'
              - 'logs:PutLogEvents'
            Resource: !Sub >-
              arn:${AWS::Partition}:logs:*:*:log-group:aws-controltower/CloudTrailLogs:*
            Effect: Allow
      Roles:
        - !Ref AWSControlTowerCloudTrailRole
  AWSControlTowerConfigAggregatorRoleForOrganizations:
    Type: 'AWS::IAM::Role'
    Properties:
      RoleName: AWSControlTowerConfigAggregatorRoleForOrganizations
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Principal:
              Service: config.amazonaws.com
            Action: 'sts:AssumeRole'
      Path: '/service-role/'
      ManagedPolicyArns:
        - !Sub arn:${AWS::Partition}:iam::aws:policy/service-role/AWSConfigRoleForOrganizations
  AWSControlTowerStackSetRole:
    Type: 'AWS::IAM::Role'
    Properties:
      RoleName: AWSControlTowerStackSetRole
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Principal:
              Service: cloudformation.amazonaws.com
            Action: 'sts:AssumeRole'
      Path: '/service-role/'
  AWSControlTowerStackSetRolePolicy:
    Type: 'AWS::IAM::Policy'
    Properties:
      PolicyName: AWSControlTowerStackSetRolePolicy
      PolicyDocument:
        Version: 2012-10-17
        Statement:
          - Action: 'sts:AssumeRole'
            Resource: !Sub 'arn:${AWS::Partition}:iam::*:role/AWSControlTowerExecution'
            Effect: Allow
      Roles:
        - !Ref AWSControlTowerStackSetRole

Outputs:
  LogAccountId:
    Value:
      Fn::GetAtt: LoggingAccount.AccountId
    Export:
      Name: LogAccountId
  SecurityAccountId:
    Value:
      Fn::GetAtt: SecurityAccount.AccountId
    Export:
      Name: SecurityAccountId