She has stated on Reddit that she is anal only because that's just what she enjoys and prefers. While certainly rare, there are many women like this. Just unfortunately not many that make porn. Believe it or not, there are women who enjoy, and even prefer anal in their personal lives and don't simply do it performatively.
Jesse is one of the few content creators who is anal-only. Her primary audience prefers it that way. That's her whole niche. If you aren't into it, there are millions of other creators who will show you their pussy getting fucked.