As you mentioned, primarily focused on the business side instead of anything related to legacy. Agree with you.
However, who's the one/s that needs to be blamed strongly for big fights unable to materialize?
It's a sad reality but the boxer themselves is just cooperating with these networks and promoters, because for the obvious reason that they receive benefits and advantages that aren't present if they decided not to be under by any firms.
They have no choice because, without their network and promoters, they will not be popular and won't be able to make a good amount of money. We know that promoters are into making money, if they can maximize their profit they will do that but hopefully, they will not sacrifice the quality of boxing sports.
These days, it's more about hype and advertisement, while the champs are trying to keep their status as long as possible in order to retain their value, and if their value will drop, promoters will also not make money, besides, they are the ones who invested big for these boxers.
That how business runs, boxing is a business, so as with other sports. If you have no influence in this market, you'll never be popular even how good you are. I think there are plenty of boxers who had wasted their talent in boxing because they don't have the opportunity to had a big fight, or their journey is very long which they already out of their prime.
I strongly agree marketing is the best strategy now to gain more support and hype the fight. I would say that trash-talking tactics with each are becoming the trend and I think that people kinda like this since it talks about the stats and compares it to others. xD
But, if I would choose i'll choose and bet for thurman this time, the last time I didn't bet for since his last fight with Pacquiao.