The time and cost to do an S-1 is massive and it can reveal embarrassing facts that lower the company's valuation, as in the case of WeWork.
The rules are made by the "deep state" to serve the establishment.
On a more serious note these rules/regulations/processes also deny access to capital to startups. It's not really that easy or cheap to go public on a stock exchange. People should do their due diligence before to invest in stocks anyway, right?