Conditioning is possible, but practice should take care of that. Given the margin, it was not prepping them for close, intense games. Players do get worn down from playing lots of minutes. But my biggest concern would be exposure to injury. If Griner gets the scoring record but leaves with only 1 title due to an injury, her legacy will be diminished. Is Kim risking injury unnecessarily?
That's the rub, as an old prof once said.
It isn't unheard of to leave players in to get records (or sometimes in baseball, not to put them in for that matter). But the decision has both an upside / downside - and for Baylor its huge. Because if something were to happen to Griner or Sims, even they know they would be toast.
I ultimately think it is up to the team / players / coaches (whatever appropriate to the sport / level). I don't necessarily have a problem with it, as I don't have any sensiblity that losing by 40 is worse than losing by 30 (or 20); always thought that was a fan assumption. And opposing coaches know what's up. So they ought to realize it isn't to beat them down, specifically. If the opposing team really had a big enough problem with it, stop guarding her, let her score at will, and make it a farce.