This is a total surprise to me. Why on earth someone would want to sync a calendar and still ignore the tasks in the process?
Anyway, my use case: In my computer, Thunderbird keeps a personal calendar in a .ics file. I don’t want a Google calendar. Privacy first. My .ics calendar file is kept updated into a cloud service, which I access within my phone. I’d like to have this file periodically synced with my local, phone calendar. My calendar is fed up with tasks, more than with events. And I really need to have those tasks available inside my phone.
Forgive my poor English. If necessary, I may try to clarify a bit more.