Median rent in Seattle for a 1 bedroom is $2k. Using the 40x rule someone who makes $80k could easily afford this, which is a low bar for someone with a moderately decent job.
Locking in a low rate alone has nothing to do with whether owning is more affordable than renting. The rate could be 0% but with a sales price high ala 2021-2022 buying mania and then adding property taxes, insurance, maintenance, and HOA the vast majority of "high" cost metros have and will continue to be much more expensive to buy in than rent in whether rates go up or down.