At least he is using a handsaw and getting out of the tree before the action. Better than some. Obviously not the most efficient or safety minded.The people who are determined they can pull the heavy leaner leader right above their roof with a rope and a guy pulling with a pickup truck to save a buck might not care what you have to say. Their mind is made up.
Then there may be a few select people who genuinely question if it’s something they may be able to do themselves and ask for your opinion, at which case if you think it is beyond the safe capabilities of a homeowner you make your recommendation.
Ultimately all we can do is advise and give our professional while also polite opinion.
We can’t stop homeowners from trying to do it themselves, only educate on the potential risks and dangers when appropriate.
Videos like this on YouTube don’t help the situation either when people search how to remove a tree themselves and this pops up at the very top: