What distinguishes land from all the other things you have mentioned is that there is a finite limit to its amount. You can issue new shares, make more goods, build new buildings, and write new songs, but the amount of land available is actually shrinking.

We need a land value tax. The wealthy shouldn't be able to extort rent from the rest of society for having bought up a finite resource that gets its value from that same society. Land speculation is a scourge that drives people into poverty and homelessness while good land goes sits idle.

https://librivox.org/progress-and-poverty-by-henry-george/