As long as the S-1 is honest, the SEC is doing its job.

A real risk is the market cap, including insider holdings, being large enough to force the stock into major indices. That makes the stock a must-buy for index funds. That in turn props up the stock regardless of how crappy the financial position and how small the float. That was controversial when Space-X went public. It went into several major indices despite not really being that big in terms of revenue.