That might be the point. They want to show the best outcome to the game.

Back when I played Rockband (late 00s), there were FBFC (full band full combo) videos. These were made not to show skill, but to highlight the optimal path for deploying overdrive/star power to maximize score. Very mechanical. They may have been played by four very talented players, but they could have used a bot as well. (YARG, or Yet Another Rhythm Game, is a Rockband clone that can be played on Linux, macOS, and Windows, and bots can play with you or on their own as a built in function.)

If it’s an action or action RPG or adventure, who really cares? Unless it’s a speed run, in which case taking hits is strategic (like Mario, getting hit makes you smaller and thus more maneuverable).

I generally don’t watch these though. I’d rather follow a guide someone typed out.