Re: Where do I begin?
"I am familiar with rent control in New York City. This is a very expensive place to live...Rent control is the only way many can afford to live there."
Respectfully, you and the author of the article conflate "New York City" with "desirable parts of Manhattan". There are plenty of apartments in NYC that are affordable or even cheap, but they're in the outer suburbs or in undesirable parts of Manhattan.
Rent Control operates primarily in Manhattan to give a relatively small number of tenants cheaper accommodation. In my entirely anecdotal observation, many of those tenants are middle class desk workers who could afford market rent (although TBF that might just reflect the fact that I mostly hung out with other middle class desk workers). It also creates lucrative opportunities for rent controlled tenants to illegally sublet their apartments to people who pay more-or-less market rate - so the tenant gets the cream for free.
There might be an argument for preserving social diversity through intervention in the market like rent control - but I don't think that rent control in NYC really achieves that and I don't think there has been a real discussion about who pays the cost of that (coz nothing comes for free).