Just seems like a flamewar comment that doesn't actually explain itself. If the whole rich vs. poor thing resonates with me on some deep ideological level, I can go ahead and pretend I understand what this all means. Maybe I can even respond with a supportive comment about something something Reagan Republicans.
The royal family gets some of it in their personal coffers, and it's a nontrivial sum, but it wouldn't fix the UK's financial problems all in one swoop to take it. And it would come at a cost of a significant amount of prestige and tourism dollars. It might be a net gain, but most people in the UK feel that it wouldn't be worth the cost to their nation identity.
Many in the UK want the opposite of nationalization. They want to sell off major government properties to private owners, and let capitalism do the work. This isn't quite a majority opinion but it has strong support (and bitter opposition).
I think it’s not just the literal king, but also all the other remaining royalty.
Perhaps privatization is a better path than nationalization. It just seems quite unjust to have literal hereditary land that cannot be transferred.
Maybe it's more than just one tiny group of people who are prone to such things as hypocrisy.
/s