PE is just a type of company that participates in the act of buying and selling businesses.
You can't outlaw buying and selling businesses. You can't outlaw people working together to buy companies with financing.
Yes, there are a lot of PE horror stories, but there are also 100X more invisible private equity style buyups that you never hear or think about because nothing is going wrong.
Many of them actually improve when they roll up the company. My local eye doctor was bought out by a PE firm. They came in and installed all new diagnostic equipment that was standardized across their locations. They now nail my prescription on the first try and it's faster than ever before. The service is also more streamlined. This is the kind of thing that nobody ever thinks twice about, but it happens all over the place.