Write the code to start a new process instance in console or powershell and add them to Windows Scheduler?

Is there a need for biz admin (non-it admin) to schedule process start from the UI?

Jk.

I would say yes, there is a need for that.  At my organization IT will usually help users set up a process designed to be "kick started" from the process scheduler in the process portal, but business users need to maintain the flexibility to modify the actual process schedule at will.  The last thing I think we want from an IT perspective is to have dozens of task scheduler jobs to manage for our users.

Losing that functionality is a big step backwards.