Sure, in most cases you'll make more money on Steam than if you were to put it only on itch, just because Steam has so many more users than itch has. I put my games on both itch and Steam and at some point just stopped trying to promote the itch-side of things, because I had to be so much more pushy to sell even one copy on itch, whereas "hey, my game's on sale on steam", works much more effectively.
However, I do not like this framing of "if you don't put your game on Steam, you obviously must hate money". That $100 entry fee alone is a huge upfront barrier of entry for a lot of people people.
I live off of welfare. $100 is almost half of my monthly budget.
"But you get that $100 back, once your game's earnings go beyond $1000!"
That might take awhile though, and might never happen actually, depending on what game you're selling and how well you can manage to play Steam's algorithm adventure. Steam still is a digital storefront in the 2020s, it's not a magical place that makes people rich just by virtue of being there.
Also, unless you're a fairly proficient artist, chances are high that you need to pay someone else to create the store art for your game, because that stuff matters a ton when it comes to getting people to actually click on your game, when they see it on the storefront.
So, the decision to put a game on Steam is a bit more involved than the question of whether or not you would like to earn money with selling your videogame.
Is it something that you may want to seriously consider? Probably. But there are real material reasons why people do not make that decision and that's not even touching the very valid reasons of not wanting to have your work be put on a storefront ran by a bunch of Liberterians.
I'm happy for anyone who can manage to carve out a space for themselves on that storefront, believe me I've been trying to do that for way too many years myself. But just putting your game on Steam is not a guarantee that you will earn enough money to justify the initial investment that it takes to even get onto the platform.
Framing this stuff like it's just about "wanting to earn money" is very short-sighted. Steam is not a magic wellspring of money and believing that still causes so many people to burn out on making videogames.
So no, it's not just about "not loving money", it's about understanding the amount of resources it takes to get your game onto a platform that is pretty hostile towards anything it doesn't consider "good" (which is often different from what regular people think) and how to approach that process with the appropriate amount of care and caution.
Yelling at people who do not feel comfortable going through this process, that they should love money more, is not the way to do this.
