The argument against that idea is that YouTube freely offers the choice to monetise or not monetise any video, if popular videos being hosted without monetisati

The argument against that idea is that YouTube freely offers the choice to monetise or not monetise any video, if popular videos being hosted without monetisation is an issue for them then it's their duty to make it clear that clicking that button might mean having your entire channel destroyed without warning or explanation. Which is frankly ridiculous anyway, if they want to change the rules for unmonetised videos, they should actually change the rules, have a setting on the button that says "if the video becomes popular enough, YouTube reserves the right to run our own advertising against the video" and just run ads.