The world at large makes all sorts of trends, and that by itself doesn't make them smart. As a developer, you are likely to have blind spots when it comes to quality and reliability as a result of having written the code. Even a team of developers cross-testing each other's code will not have the same ability to find flaws (before they embarrass you in front of the customer/client/user) as a dedicated tester whose job it is solely to find new (and old) ways to break things (and document them.)
DevOps is a completely different thing (though they work together with testers.)
It is only weird to have dedicated QA on your team if you don't give a fuck about releasing shit with bugs in it for the user to bump into.
I just checked LinkedIn and they have quite a few job listings in this vein. Which makes sense: in the "AI and YOLO" development lifecycle, automated testing is more important than ever.