Utter horseshit. Just ask a few landlords how easy it is to make money from rental property.
Why it's cheaper to buy on a 30-year mortgage or whatever the bank offers than it is to rent. People who are responsible for their own property keep it up and make it last longer.
No, the reason it is cheaper to buy than to rent is that there are tax laws deliberately designed to benefit the wealthy.
When you are landlord, you can write off all repairs, pay yourself, take depreciation, etc.
Renters get ZERO tax breaks at all, and banks won't give poor people a mortgage, even if they can prove they have never defaulted on their rent.
The tax laws and bank practices are incredibly discriminatory, unfair, and fraudulent.