While this is true to an extent, from experience this line of thinking has its limits and is very easy to misapply.
If the majority of contributions come from one person, then yeah, maybe that person should dictate everything. Else you'd miss out on all of those contributions, no?
I use Home Assistant. If reported a few bugs. Every single time I get a really friendly response. Often things are fixed quickly. Things are discussed, different opinions seem to be appreciated and considered. This doesn't mean that they'll do whatever someone suggests.
What I find funny about the one contributor who does the majority of the work situation is that it can also be seen in a different way.
Home Assistant as a project has grown like crazy. I'm unable to say exactly why that it, I must see it a great accomplishment.
At one point Home Assistant was just one person doing the majority of the work. Nowadays it is far from that. Pointing towards just one person doing most of the work ignores how it maybe could be. Meaning, maybe with "magic" the project would be crazily bigger. With a crazy amount of contributors. With maybe people paid for by companies to contribute.
That's what I find lacking in the logic as said by some comments (not by you). It's a comparison of the current status, not of different outcomes. And those outcomes could be worse, or better.