The point is that I want to live in a more egalitarian society even if that means I personally have to pay higher taxes (relative to what I get back in social services).
But also I think you may overestimate how secure your position is - people get sick in a way that means they can't work for a while (or at all), or are limited in how much they can work. I also never thought it would happen to me but when I was in my mid 30s with no history of serious illness or any health issues I was diagnosed with a malignant brain tumor. I had to get operated to remove it pretty much instantly and was not able to work for months afterwards. For as long as 6 months after the operation I was only working very part time, and this is for a more or less best case scenario with cancer - it was caught early & I didn't need chemotherapy or radiation therapy. If I was less fortunate I may have been unable to work for a year+ afterwards and may have never 100% fully recovered.
And this is not the only way your fortunes can change, you can get hit by a bus, get injured in a burglary, get drunk one night and slip and fall. All of these can more or less random events can result in you continuing to live but without the ability to command as high a wage afterwards. I personally know people (software engineers even) that experienced stuff like that, or even seemingly less severe issues (burn out, depression) that still meant they were no longer at the top of society economically like they were used to.
I want to reiterate that I'm not trying to convince you you are "wrong" - maybe your personal risk/reward tolerance is such that where you are makes more sense for you. I'm an immigrant here and could have immigrated to the US instead of to Europe if I wanted to (I'm Israeli so had no particular advantage that would have made it easier to go to Europe than to America).