Today different components (Work Spaces, Reports, Work Bench and Warehouse off the top of my head) all have a mixed bag of options when it comes to scheduling them.
Data Warehouse supports SFTP, FTP and Email, Reports only support FTP and E-mail, Work Spaces can only be E-Mailed.
It would be more practical and better user experience to let all exports share the same full list of options especially given the fact FTP itself is being widely deprecated in favor of more secure standards (SFTP, FTPS) and more data feed delivery options are being requested from the user community.
https://techhq.com/2018/12/are-we-finally-saying-goodbye-to-ftp/
