Yes. I usually still tailor my games around 60fps minimum, with a few exceptions like Overwatch. With Freesync / Gsync this is good because drops below 60 are fine, unlike regular 60hz V Sync, and less input lag.
As for 60hz no v sync vs 144hz no v sync (and no Free/G), it's still better for 60fps gameplay. The display itself refreshes so quickly that tears are less noticeable.
And if you got a 144hz panel without Free/G Sync (why you would do this, I do not know), and still preferred 60hz V sync over 144hz uncapped when averaging around 60fps, then you can always change the panel to 60hz in Windows for gaming. Sort of a waste of the panel, but what I'm saying is that in no way can a 144hz monitor be worse than a 60hz one (all other things equal).