If you’re interested in earning $300-400k/year after working for a BigCo for 4-5 years, Seattle isn’t going to work out to a better net savings/year.
I think it’s perfectly fine to max out at $100-150k. You’re still extremely rich by any standard. And startups in The Bay Area will pay you vastly less regardless, so Seattle may well be a better place for startups.
But I think you’re doing people a disservice if you convince them they’ll save more money working in Seattle than the Bay Area.