There are a lot of people doing room share to take the cost of rent down or commute long distance. You can definitely balance between price, commute, comfort, privacy, grownupship and self respect. No surprise that many people really, really want to fully work from home so that they can better optimize.
9K is exaggeration of course, that would be quite irresponsible but it would be also the only way to put you in a lifestyle of a person who makes 10K a month.
Rent should not take more than 25% of your income, 33% worst case. In some countries/jurisdictions that's even part of legibility requirements.
If rent/utilities are in the range of 75% or more as you seem to imply, there would be literally no point at all to work in Big Tech.