This was so refreshing to read - and thanks a ton for sharing! I wish I had the clarity (or the choice) to be able to make such decisions. You are absolutely right that most decisions are already made at the big techs and you are only left with the execution part. Also, evaluating most decisions on the principle of 'least regret at end of life' is probably the best advice I have heard in a long time.
I believe you made the right choice for yourself. I wish you the very best in your current role and future endeavors - am sure you'll do well regardless of where you are!