Relative simplicity is what I really like about slingshots: I say relative, because the numerous variables that it takes to make a good slingshot and to acquire sound shooting skills actually could in fact be viewed as fairly complex.
In my opinion, shooting without some form a release mechanism implies more direct involvement in the pouch release process, which is both challenging but also fun. If anything, I would prefer to opt for a lighter band set if for any reason my release hand decides it cannot handle the task at some stage. If that becomes difficult, then I would consider a slingshot rifle.
I found recurve bows more fun to shoot than powerful compound bows that imperatively need the release trigger system. which I find rather fussy to use.
As other have said, keep it simple. That's what this sport is all about in so many ways.