Too Long; Didn't Read

A Bitcoin Developer called Odell has posted on Nostr a series of posts, all claiming that Michael Saylor has come out to fight Bitcoin ETF companies that plan to hire and finance Bitcoin core developers. The implication is that Saylor believes this is really bad for Bitcoin, but the other implication is that people are mean to Bitcoin developers, thinking they do nothing all day except look for typos in Bitcoin core. As Bitcoin is "unchangeable". Well, Is it? And what is a developer who does not develop? Do we even need developers?