It's not all that black/white. I'm also on a similar journey to David (volunteer for Mozilla since I was 16, I'm 37 now), with a lot of passion for the project and invested in some large projects there.
AMA, and don't let other people's journeys decide on yours.
I understand it's not black/white and the current restructuring to focus on increasing revenue in the near future could be temporary and they could eventually refocus on improving the internet for people.
I'll still keep an eye out for that and if this is the case in the future, then I will definitely try my luck at applying then.