However big his transgressions may be, it's actual impact is finite, while the speculation can be infinite.
OpenAI and ChatGPT are great and gets a lot of mind-share. But they are far from the only game in town and, at this still very-early stage of the tech cycle, the outwardly-visible leader can easily change in months.
(1) Unless there is public litigation in involved, OpenAI will not disclose the reason in susbtantial detail.
(2) It will not, more than momentarily, disrupt the whole AI market if they do not.
(If it is something that will disrupt the whole AI market, there is likely to be litigation and public information about the basis of the firing.)