Your statement definitely does not apply where I currently live (Austria). No tech company I've interviewed here is 100% remote as of now. They always expect more or less around 30-50% in office presence for new hires. They almost always have some staff at near 100% remote but those are usually tenured employees that management does not want to lose, so they get extra privileges as a bonus.

>Of course, such numbers mostly make sense in the US because it is (socially, in terms of security) a desert hellscape.

That's also not true. American tech workers don't have higher salaries because they get less social safety, but they have higher salaries because a lot more investment money, by orders of magnitude, gets poured into their tech sector compared to Europe where most goes into real estate instead, while the US also has a smaller supply of devs due to their expensive higher education and tougher immigration laws than Europe, meaning that the high demand of devs in the US can't be met by their low supply of workers, so their salaries naturally rise accordingly. It's that simple, basic supply and demand, nothing to do with the presence or lack of social safety from the government, as US taxes aren't that much lower than in Europe.