If, in the current system, real estate investment wasn’t profitable, no company or landlord would buy to let.
The problem is that there is a housing crisis right now where rent is through the roof, buying is out of reach for a big chunk of the population and its getting worse.
The commodification of housing fucked us over.
And then, you have people like the OP I was replying to, that whines because he has to pay the fifth of the value of the building, while the tenant pays his mortgage+ taxes minus 100$ and then get pissy when he gets called out.
Again, the saddest song in the world with the smallest.of.the violin.