As long as they don't have a family or want to build equity in a home. The justifications for the costs in this thread are so myopic that it's baffling.
Okay, you said it's trivial for an entry-level engineer to save six months living expenses. That's $12k for housing and ~$4k for food and transportation. That's the majority of the leftover money after rent, taxes, transportation, and food for a year without any savings. I'm not sure you are correctly using the term 'trivial'.
Edit: Also, you didn't even address the direct counter-point to your argument that the savings is "trivial".
As far as addressing counterpoints, I've grown tired of quibbling. I think that you can live comfortably spending 66% of your income net of taxes per year without any undue effort if you make $80k a year in SF. I think anyone who looks into it would find the same to be true. That's my last word in this conversation.
That's fine. As long as you can admit that you are just arm-chairing it and haven't actually had to live under those restrictions.