If you own a business and wish to retire, your options are pretty much to sell, pass it on to someone, or dismantle it. I don't know how this is even a question really. Where in the article or the comment section is anyone saying they shouldn't be selling?
Your comment is entirely conjecture. Even if we assume it is correct, no young person is creating similar businesses? If so that’s the root cause, not PE, since the alternatives would be all of these businesses shut down anywhere per your reasoning, backlog increase and the remaining businesses increase prices anyway.
Two connected anecdotes:
1. In the 90s, I had a struggling one-man Mac ISV, and would do gig programming on the side. I did a lot of work for boutique investment banks, and also for a "consulting" firm that did about 75% of their business with the finance industry. The owner of that firm praised me, but didn't like that if my business took off, he'd lose me.
"What would it take to get your commitment to this firm?"
50%
"Where will you get the money to buy half my company?"
A loan from the firm?
When the dust cleared, the business loaned me the money to buy in, and I paid it back with 50% of my profit sharing payouts. This is not some weird financial alchemy, a lot of partnerships are run this way.
———
2. My Duathlon racing buddy was a mold-maker, very specialized and good at his trade. He worked for an elderly entrepreneur who had built his mold business up over decades. Said entrepreneur sent his own kids to university to become "professionals."
What to do about succession when he was ready to retire? My buddy literally photocopied my own arrangement, bought 50% so the business would have a successor it could count on, and bought the remainder when the founder retired. He is now a comfortably wealthy automotive sector entrepreneur.
———
The huge LBOs in the news always seem like space-age deals, but little LBOs for succession purposes are remarkably common.