You are reading information from people who keep the same snakes as you but you don't believe what you read? Unregulated UTH burns are real; do a Google search for images, I wouldn't recommend doing it while eating as some of the pics are hard to look at.
I'm using UTH for now until my T10's show up; then I'll be switching to RHP only and no UTH. This information comes from the wonderful people on this site who have been raising balls a lot longer then I have.
So read what you want; believe what you want. There's a recent thread about one ball python eating another ball python while the owner was cleaning their enclosure and put them together for a short time. So it does happen.
Can you keep two snakes together; sure. Would I recommend it; no.