What new ideas exist that some “programmer” can build themselves with a laptop and an energy drink? CRUD web app ideas are largely exhausted and their functionality has been absorbed into 5 major companies. If an idea is truly new and shows promise one of those companies will quickly clone it and integrate it with their platform, so their existing users have minimal effort to start using it. They won’t use your new app. Signing up for services is a pain.

Starting a tech company these days is going to be more and more complex. You can’t get by with a web app you hacked together in an afternoon. And, it will likely need to involve AI and have plenty of capital to procure users via marketing.