Not even close, a lot of places are hybrid and there's a valid concern that we'll see more tech companies (large and small) follow in Amazon's lead just because Amazon did it first.
Currently trying to leave Amazon and it's been a slog to even get an interview for anything fully remote despite a decade of experience.
While I agree with the "are you serious?" part, there are plenty of other companies that are backtracking on remote work, including quite a few small and/or early-stage startups that I see posting in the monthly "Who's Hiring" threads here on HN.
I know of no studies that show that RTO mandates improve any measurable statistic for a company, and remote work has done wonders for my commute and well-being, so I will no longer consider working for a company who does not have a majority of its employees working remotely. I'm a staff engineer with a couple decades of experience. My current company is 100% remote and it's lovely.
Everyone in the industry knows Amazon has very poor work life balance (and a brutal on call load). It's even in that letter you get from Jeff Bezos when you apply: "You can work smart, hard, or long. At Amazon you don't get to pick just two."
If you are fresh out of college, get a couple years in to get it on your resume.
For anyone else, if you are in the Seattle area I don't see why you wouldn't just work for Microsoft. Microsoft does pay the worst out of all the big tech companies (until you get to L67+), but the work life balance is so much better, and allows fully remote.
Currently trying to leave Amazon and it's been a slog to even get an interview for anything fully remote despite a decade of experience.