My data is personal experience telling users that the reason they have to buy a new logic board is that they've been running with the screen closed. I saw a lot of them over the years, but never had to tell a user twice once I charged them $500+ for a new board.
So completely anecdotal? ever hear of conformational bias? would that be like 2 a year? or 100? intel or apple silicon Macs? MacBook airs or beefier pros? sorry, but if you are going to call everyone IDIOTS then I want to know where you are coming from. It's not surprising that people didn't need a third logic board over the lifetime of one laptop, so your warning probably had nothing to do with not seeing them again.
I am not debating under some circumstances of intense video editing some Macs can get hot (especially Intel Macs), but even then it would be accompanied by loud noise as the fans kick in. in that circumstance if a person doesn't evaluate their set up then okay, call them idiots I suppose. But for the vast majority, especially with the apple silicon chips that require less power, simply not an issue, so says people that actually take measurements.