Many specialties were eliminated / absorbed over the past few decades. I started working almost 30 years ago. Today, I rarely see dedicated testers, just like I rarely see dedicated DBAs. Sysadmins went away with the "DevOps" movement. Now they are cloud engineers who are more likely to understand a vendor-specific implementation than networking fundamentals.

Except testers are needed. Testing is not merely a technical role. It's a social role. It's a commitment to think differently from the rest of the team. We do this because that provides insurance against complacency.

But, by the nature of testing, we testers are outsiders. No one is fully comfortable with a tester in the room, unless they are more afraid of failure than irritation.