Tech alone is never enough.
Tech is a tool, like any engineering discipline. It does not suspend the rules of economics.
But if you realise these basics you can, with the help of tech (optionally using your own skills) start and successfully grow businesses that solve real (!) problems.
Those businesses do not require VCs. They won't be as big. But they can be very profitable.
I know. I have grown several. 100% success.
Tech is not a religion. Just an engineering tool.