Can you tell me why renting land/a home is different than any other object that can be owned?

For starters, you can't own much if you don't own land. So it becomes a prerequisite for accruing any other objects.

If you're locked out of owning land, you're locked out of owning anything.

it seems like land owners (or “speculators”, if that’s the correct term now 🤷‍♂️) prohibit access to everyone except for tenants

Speculators (or, "land owners", as you're calling them) aren't required to host tenants. They can leave their property vacant without regard to social need.

And landlords can evict tenants for any reason or no reason at all - or raise rents so high that an eviction is inevitable.

A question you need to ask is why the landlord possessed the land to begin with. What allows a landlord original access to property?

People need homes.

You buy a pressure washer, and rent it out, thats a good business. Theres no shortage of pressure washers. I can live without one. I can biy my own relatively easy. Choosing to rent or own is a question of how often I expect to want to pressure wash something.

You can only rent a home that you buy. Which means you had to take it off the market. You can also only rent a home (or room) that you aren’t living in. Which means you need somewhere else to live. You’re taking more than you need, to charge someone else who also needs it, to cover your cost of owning it, maintaining it, and presumably profiting from the difference.

When this is done at scale, you have owners skewing the market to make it harder and harder to buy.

They make more money, buy more properties and make it worse. While renters, and young adults get trapped i to renting because they have no options.

That is what makes it so much different.