He has a point tho. The amount of copy pasting random shit from the internet into the console is way too comon if you go down the rabbit hole on some issues with the system and find a solution on some abandoned by god itself linux forum.
To be fair its usualy just a comand that does shit for you in 5 seconds so you dont have to use gui buuut it does happen and i can tell what this stuff does but the average user likley dosent .
Alghtough it might be less common today. Its been quite a long time since i last broke my system.