Replying to Just a weird thought about aliens and stuff

all these scientists and astronauts or whatever are looking for water on other planets, but life on other planets is probably completely different than humans, maybe not COMPLETELY different if its planets in our solar system, but still different. so what im getting at is what if these creatures dont need water to survive? what if we are just looking for water when we should be looking for actual living things on other planets? huh?