To be fair it is not just the bareback niche but all niches.

If you are into twinks you want to see twinks...if you are into Uncut Latinos then you don't want have an update with a cut white twink. Etc.

Yes, sites that offer content in a specific niche must stick very closely to that content or the members will not be members long. They will go to a competing site that does stick to the format 100% of the time.