Using valuation as a measuring stick is a bit silly given how much valuations can be inflated based on a pre-revenue idea and the pedigree of the company founder(s). When Mira Murati and Ilya Sutskever left OpenAI and walked into a room of investors saying, "I'm starting my own AI company", they arguably both created one-person, billion dollar companies right then and there.

You can argue it, but I disagree. Whatever their skills and experience, they did nothing alone.