Why would you go through all the trouble to do it all yourself when you someone else can do it at a fraction of cost plus you having almost full access to it whenever you want, however you want?
> "If OpenAl disappeared tomorrow, we have all the IP rights and all the capability. We have the people, we have the compute, we have the data, we have everything. We are below them, above them, around them."
~ Satya Nadella