I almost totally agree with this, but there are many important applications, features and protocols that are complex enough that the solo nights-and-weekend warriors cannot make a dent in them. 

There's a whole class of problem that needs programmers to get paid - and well.  

 It has to do with organizing into larger, coordinated teams and biting into problems bit-by-bit.
That extends the delivery date, but it doesn't necessarily stop you from building a solution.

It's a team of part-time devs, is all.