Writing code is a very specific and highly technical skill, you cannot just will yourself to do it without many hours of study and practice. Doing business strategy + machiavellianism 101, which is realistically what 99% of these people do, is not a very complicated or technical skill at all, the average high schooler understands these things for the most part, and AI can do it better already.
There are thousands of products and companies out there that were once okay, and did pretty well, after which they got taken over by the MBA/marketing people, and now their products are enshittified, stagnated dogshit, they only exist because of existing customers and connections, and they can be easily outcompeted.