Then you have very different priorities than an airplane owner. You pay for plenty of things that are extremely expensive, you just choose different things.

I too make six figures, and I don't think I do anything as expensive as completing flight school and co-owning a Cessna. I mean, my house is more expensive than that, I guess, and my car is (barely) more expensive than flight school might be, but surely amateur pilots have houses and cars too. About the only expense I have that might come close to serious flying as a hobby would be pets, but outside of the one time we had to pay for chemo for our dog it's not that expensive.

What was your cost?

In US you can get a license for as low as $8k total. In expensive California, expensive SF Bay Area cost is around $15k total.

You're saying that amateur making six figures cannot find $15k for something they basically live for? Sounds very unlikely.

Btw, there's no cost of using airport runway, it's paid from your taxes.

There is no cost of using an airport runway, at least in the US...