You could, and some do, but why would you? It’s really not unreasonably hard to get to a reasonable level of crawl that is much easier, more efficient and faster. This is especially true in a wetsuit. I went from ‘swimming to stay alive’ to a mid pack 75 minute IM swim between September and July. This was using a combination of swim smooth drills, youtube and around 20 group lessons. Using buoyancy shorts in training really helped me too. Before I started I couldn’t really do more than a length and thought it might be beyond me. Much better and more satisfying to do it properly and learn a basic crawl stroke.