It seems like you are invoking the No true Scotsman fallacy. There's a lot of companies that do "Agile" and "Scrum" that are exactly like he describes. When Feature X has to be done this sprint because it's already been sold to (Board|Client|Investors|Other Dept), there's not much time to think about "How?", it's more like "If I'm going to be working Sat and Sun again?".
I'm sure there are organizations out there where Agile/Scrum is working fantastic for them in practice, and developers are happy with their work and career prospects. I just have yet to encounter one in the wild personally.
I'm sure there are organizations out there where Agile/Scrum is working fantastic for them in practice, and developers are happy with their work and career prospects. I just have yet to encounter one in the wild personally.