I think it's because people see capitalism as one thing, while in reality they are implemented very differently.

The nordics are not successful only on their capitalism. It's because it is regulated, and because the money is distributed more fair than in other countries.

The Nordic countries are also on Earth, which we are destroying. Some of their wealth comes directly from that destruction. Norway is the 5th and 3rd largest oil and natural gas exporter, respectively, making their happiness the result of good social policy that makes up for capitalist inequality which is directly funded by destroying the Earth and fueling capitalism elsewhere.

Even setting the climate aside (a ridiculous thing to do, really), the Nordic model isn't possible to sustainably replicate elsewhere on Earth on capitalism's own term, because we can't make every country a net exporter of the most desired commodities for obvious reasons, or the beneficiary of complex historical circumstances, like neutrality during ww2 (Sweden), or a long-time colonial power (Denmark).

Put another way, there is no Nordic model available for Bangladesh, whose workers work six days a week in factories to make the cheap clothing that happy Norwegians wear. Norways needs Bangladeshes to keep their standard of living.

In a previous job, I spent a good amount of time in a Bangladeshi garment factory. That specific factory in which I worked had been on strike a few years prior, requesting a raise to dozens of dollars per month. That's not a typo -- per month!. The police fired into their picket line, killing and wounding hundreds. This fall, Bangladeshi garment workers went on strike again, demanding a tripling of the minimum wage from its current ~75USD per month.

The urban poverty that makes my life possible, so far away, out of sight and out of mind, is an absolute fucking disgrace. We should talk about it daily. When they go on strike, as those garment workers are now, every single westerner ought to strike in solidarity, even if motivated by nothing but shame. Instead, we don't even know that it's happening, at least in the anglosphere.

I've since become convinced that there''s only one path to a just and verdant world -- international solidarity. Communists and anarchists have filled libraries with ideas for what that might look like. I've read some tiny sliver of that corpus. If you actually want to know why some of us want capitalism defeated (beyond the anecdote that I just relayed), or if you're curious how much better some of us think the world could be, I'd be happy to point you towards books that spoke to me.

Cuz rich gets richer and they steal my wages. Fuck em.

It's probably not sustainable for one.