I don't think this is a casual take at all. I think it's pretty honest and the reality of the business and that's exactly what Fabian is saying. Like it or not, no one wants to see the Belal fight and it's the reason why the fight hasn't been booked. And for Leon, it's not a big fight at all for the reasons mentioned. They want bigger fights.
People talk about this not being a "sport" for those reasons, I don't think this applies, particularly in this case. If it comes down to the best fighting the best and if Leon fights Shavkat or Khamzat before Belal, which are more dangerous fights, he is fighting the best. Belal would be nothing more than a rudimentary title defense that he would easily win.