We keep finding life on earth in places where we didn’t think life was possible. And yet, when we look at the stars we have the nerve to talk about there being a “goldilocks zone” for planets in other solar systems, like that’s the only way life could exist there.
I’m sure there’s life out there somewhere, and I wouldn’t be surprised at all if carbon/water based life turns out to be a minority in the universe.
Yes, water is a simple compound made of some of the most common elements in the universe, so it’s reasonable to think other life might also evolve to use it. Carbon is also a really handy element for making complex molecules, and is also really common. But, it’s a failure of the imagination to think that life elsewhere has to follow the same basic chemistry as here on earth.