See, the wording here is part of the problem though, I'm afraid. "I get that it's boring to watch the best of all time". Like the problem is with the audience when the spectacle is too predictable. That the problem with those who want a better or more competitive spectacle is that they just hate excellence (remember you're on a cycling board, a lot of us remember being hit with that argument by He Who Shall Not Be Named, the final boss of cycling villains) and can't appreciate that they're watching somebody who is absolutely at the peak of their powers.
But we do appreciate that. We appreciate that if he keeps it up at this rate, Bø will overtake Fourcade and Bjørndalen's records. But you know people were just as bored by Fourcade, right? But at least in those days, it wasn't that all of the alternatives were also French, and there were enough holes in the various teams' depth that relays at least held some interest. Again, like in combat sports, you have to have challengers that people believe can beat the champion. Not like, they have to be a perfect match or anything, but that with luck falling the right way, at their best, they could do it. Svendsen or Shipulin were good examples of this during Fourcade's peak. But there just isn't the belief that there's anybody out there that can genuinely threaten Bø at the moment, and the only people even remotely close are his teammates, so it's just SSDD on the rare occasions he doesn't win.
XC skiing was really hurt during the peak of Norwegian domination on both sides of the gender divide, and biathlon profited significantly from this. Women's XC has benefited greatly from the retirements of dominant champions because the field is more open again - and seems to be getting good reviews for the spectacle this season even with a Norwegian holding the yellow bib and being the strongest athlete of the season. I've joked that as Norway has traditionally favoured XC (as opposed to traditionally biathlon-favouring nations like Germany) Norway's answer to this was to try to make biathlon as boring as XC. For the first time, albeit only on the men's side which has suffered more from dull spectacles thanks to just swapping one dominant champion (Fourcade) for another (Bø), it feels like they're succeeding.