Yes. As someone who's written popular open source before, I can say that if it made me money, I would've happily invested more time into it. Instead, it just brought me lots of thankless work, which caused me to abandon it.
Funding would go a long way towards making open source better. It doesn't solve everything, but it actually would make a huge difference.
Let's say that sometimes money could solve problems ( even with mental health and chronic condition of a family member ). Does this mean that if "moment.js" was a some sort of a huge money income we would've seen the author maintain his role?