Telling me that I'm arguing with some high and mighty breeder is self explanatory, IMO. And read up on yearly breeding. See how healthy it is for a snake, lol.
Personal experience also. I kept two red tail males together because I had a HUGE enclosure for them. Had two warm sides, two cool sides. Hide logs, plenty of cypress mulch for them to burrow under if they wanted. Multiple water dishes. It was BEAUTIFUL.
Neither showed any signs of aggression towards me previous to them co-habitating. They refused food. They would shed in tons of little pieces, and I was pretty ridiculous about the humidity and temps. They would also strike at me, hiss at me, and just be plain old MEAN. I separated them and they are both eating every 12 days (my feeding schedule) and they're actually healthier loooking.
That is your problem there. Never house 2 males together. I even said...my pair I house together is 1.1
NEVER house males together, no matter how large the enclosure is.