Well... better to have a 14" bar stuck in you and come down on a rope than to make the surgeons fix all your broken bones in addition to suturing up your wounds.
I don't consider falling to my death an improvement over getting wounded by a saw or falling wood and then falling to my death. As far as that goes, proper training and equipment will prevent a lot of suspension injuries by folks who couldn't come down from the tree because of other foreseeable problems.
Example: a climber dies because he gets knocked out aloft, and the fire department gets there too late to get him down.
Had said climber been wearing a helmet, he might have only had a bad headache. There are very few injury scenarios in tree work that wouldn't probably have been prevented with a little bit of preparation and observance of the rules.
My example of getting knocked off my perch was a good example. I wasn't breaking any rules, but a bit more experience would have eliminated that particular risk. Please consider that you are starting at the bottom of the learning curve, and are taking on all the risks.
"bucking billy Ray" is a YouTube influencer who likes to make videos illustrating his high-risk, adventurous lifestyle. While I have no doubt that he is quite experienced, there is no reason to assume that what a person can do is what they should be doing. He wasn't selling training, he was selling video clicks. And promoting his merchandise and brand name.
https://buckinbillyray.com/