You're just being flippant at this point but here goes:

You will never achieve the same reliability, scalability, performance, and security, at the same cost, by doing it yourself. And it's fine to layer 2 services together to get all the functionality needed. That's completely normal - like how you can use multiple APIs to build an app - unless you have a specific scenario, like security regulations, to avoid a managed solution.

Maybe building all that means you're a "hacker" but most users are acting on behalf of businesses and there are far better things to spend time on than creating a worse solution to a solved problem.