Maybe I should have been more clear. I agree that social constructs designed to chain people to a given location are bad; I disagree that rent control is one of these constructs. It might be true that people tend to hang on to apartments that they otherwise wouldn't because they're getting a great deal, but this is a voluntary choice, not the company store. The bit about "allow[ing] the plant to catch flight and land somewhere better" seem like a little bit of movie logic. Many people do derive real value from being established in a community, and would be hurt by being forced to move.
Why does the debate always veer back to renovation of the buildings? Do you really think that adding stainless-steel appliances to an apartment is a more desirable goal than not displacing established residents?
As for your personal experience with the wealthy lawyer, here's the balancing anecdote: I live in the Mission, a part of town where rents are rapidly increasing (I'm sure I'm guilty of driving up prices). There are plenty of people down here who can only afford to stay in their homes because of rent control, and stories of tenant intimidation are plentiful.