I make mine almost exactly as you do - probably no need for the water but it's one of those things I've always done, it's how I learned, so why change? Sorta like all that reading about a water pan in a smoker I guess. Some folks say your smoker will roll away and flip you off if you don't use one, some folks say they never do.
I started doing that because the best knife I had to get around the pan scratched the non-stick coating. There's been a lot of cakes made without non-stick coating for sure so that's something I put on myself. Maybe I was fixing a problem that did not exist but man it sure comes out easy. More work than a knife? Probably. It takes some time (mostly waiting) to make a good cheesecake so I hesitate to change what works for me. Of course the "mistakes" always taste good.
Ever messed with crème fraîche in your cake? I use that with excellent results. (not trying to take away anything you shared here, just conversing.
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