This does not add up. At 100k pa in San Francisco you would get something like 67k after tax, minus 30k for rent, minus (let’s be generous) 15k for other expenses leaves 22k, not “north of 50k”
Yeah, it is always deeply ironic when someone complains about people who can’t manage their finances well, then asserts that it is possible to save north of $50k with a salary of $100k in SF.