The body isn't designed to have huge loads placed across the shoulders where the load is basically concentrated on the discs in the lower spine.
Most power lifters have problems in later life because they fuck up their joints lifting weights that are too heavy for them.
The girl in the vid is going to keep going heavier and heavier and eventually somethings going to give.
Powerlifting is stupid.
The human body is designed to perform vigorous work. Its capacity to adapt to specific intensities of varying physical movement is
staggering.
You say "most" powerlifters have problems later in life. Funny, I personally know many one-time-champion powerlifters and, barring catastrophic injury (which usually results from use of drugs without a reasonable platform of training to structurally accommodate greater loads), a majority are JUST FINE. Sure, aches and pains here and there; but with older age, these things come to us whether we lift or not.
Better to be strong and achey than just achey.
You say powerlifting is stupid. If you think this, that's fine. You are entitled to your opinion.
However, you clearly don't know much of anything about strength training, so it might be best to avoid commenting about such things.
Some desire money. Some desire a larger home. Still some enjoy having a large family. And some like to buy extra-nice clothing. Some folks like to fight in cages and others like to train to run great distances.
And some desire to become elite examples of human strength and power.
Wouldn't surprise me if you desire to launch another pizza pocket into your microwave, drink beer and remain the average guy you'll likely always be.
HTH