Many large companies absolutely refuse agile delivery and require fixed scope and cost to get anything done.
Yes, waterfall is a bad choice. But no, clients aren't to blame for trusting a vendor to do right by them.
Why use quotation marks for something I didn't say? Nothing I've said means "fuck the clients" unless you are maliciously taking the worst possible interpretation.
A change that takes a massive amount of time and effort isn't something I should do for free.
I'm more than happy to build a backlog, refine it, and build until there's a RC... so few enterprise clients want to subscribe to the perceived risk, they'd rather spend months specifying everything upfront to make some senior person happy whether that delivery methodology has been proven to work or not.