The answer to every such claim is just: no. But it's click bait gold to the brain damage outrage YouTuber brigade.
Accidentally using a ton of resources might e reveal weaknesses, but it is absolutely not any software vendors problem that 100% load might reveal your thermal paste application sucked or Nvidia is skimping on cable load balancing.
The issue is 1) actually exaggarated in the community, but not without actual substance 2) getting disregarded exactly because of exaggarations. It was a very real thing.
I also happen to have a multi gpu workstation that works flawlessly too
These guys are running an intensive game on the highest difficulty, while streaming and they probably have a bunch of browser windows and other software running background. Any weakness in the system is going to be revealed.
I had performance issues during that time and I had to restart game every 5 matches. But it takes like a minute to restart the game.