Not all companies have the resources and/or opportunities like Stripe and Facebook. Coming from the SME/laggard industries those posts sound completely out of touch with the reality of a lot of SWEs that are not in this demographic pool.
One of the biggest disappointments with the SWE was the fact that when I started my career I really enjoyed working with a lot of eager-to-learn young folks at the same time had time to be mentored by a lot of seasoned engineers with 25, 30 years of experience and how those folks liked the technical/development part.
Fast forward a couple decades we're most of the time in my demographic in an environment that has a phobia of age, the craft is not a big deal anymore, a lot of young folks fall short due to lack of mentoring, senior folks do not want to mentor anymore due to cynicism provoked by this same work environment; and everything consists in self-marketing, corporate politics, mimic-big-tech cultures.