No, too reductive. Rent-seeking is when people manipulate a situation to charge money without providing value themselves. Landlords are rent-seekers to the extent that they don’t do much, they mostly just own property - typical rent is many, many times the value of someone looking after the maintenance and building insurance for you (and anything else you want to argue a landlord does). The housing supply is naturally quite limited so the market doesn’t self-correct.

And anyway, if enough people don’t like the things people are doing with money, we can stop them from happening! So a pretty odd gotcha, to me.