I'm not sure you and I share the same reality.

90% of everything is crap that includes open source.

People do get paid for open source software. If you have a known OS project on your resume you will get better economic opportunities.

If woods was as cheap easy to copy and share as software, carpenters would be building giant Trojan horses in their spare time, to show of their skills and simply for the fun of it.

OS software does not devalue quality software.

If software is important to you, as in bottom line important, then you are not just happy to pay for it. If the software that works for you happens to be free you STILL look to pay someone to make sure it keeps working.

OS kills no-quality software.