Why don't you find out more about him?
All this simplistic stereotyping is really harmful and why we will end up with unprincipled people in jobs other people routinely slag off, eg politicians, estate agents, solicitors, landlords...
For some people having a landlord is a very good thing. I can put my hand in my pocket and get the boiler changed, I can moderate my tenant's rent if she's having a crisis. I can and do provide security.
It's like saying leasing a car is a waste of money but loads of people (90%) do it now so that they have access to the capital and don't need to worry so much about depreciation and repairs.
Renting gives people flexibility, people are quick to moan if their PFB can't find a place to rent at Uni or move for work. No-one adds in the cost of buying and selling when looking at renting costing more than buying.
Safer to rent if you're in an unstable job as you can get housing benefit element of UC, not just lose the house when you can't pay the mortgage, where there is little aid. I personally think that's why council houses were sold off, to reduce social security costs.
The real issue in this country is that councils don't want to build houses as it's paving over the countryside and the taxpayers will have to pay for it. My local council have only just paid off the borrowing for the 1960s new town it built and that has been a slum for years. Homeowners are happy when house prices go up as it proves they made the right decision but really it's all down to a nationalised planning system leading to scarcity.
Look at towns where small builders originally built the houses, all different and interesting. Now all the building is done by big building companies who landbank, artifically keeping supply low and new housing low quality. Or people having holiday homes and taking property out of the housing stock.
Loads wrong with the system and a complete lack of political will to fix it, compounded by people being polarised and not really understanding how complicated this is.
He may be a complete shithead landlord and there's many of those but he might be principled and have a family that support others, you don't know, you just think he should have a "job".