"How exactly does the ability to tinker help me, since I do not have
the skills needed for that tinkering? That benefit might be great for coders, but not everyone
is a coder."
You don't have to BE a coder to benefit. You might benefit simply because a random coder
somewhere in the world happens to fix a bug that was bothering you. Or you might have a friend
who is a coder who could do some work for you. Or you could pay a coder to make a change you
really want. None of those are options with closed source.
I won't claim that these benefits outweigh what you perceive as the negatives of FLOSS
products. But to dismiss them as meaningless is...looking for a word that isn't
flamey...incorrect.
There are other benefits too, such as avoiding lock-in and avoiding your favorite app being
abandoned by its author, leaving you with no hope of running it on your next computer. But
that's a different thread.