It’s not strange at all if you understand the differences between a private sector union and a public sector one. What’s really strange is how anyone that’s not a member of a public sector union could think it’s a net benefit for society as whole.
Look at that midair in Europe (euro control) where one overnight controller was managing a giant chunk of airspace and was task saturated. Then afterwards all this scandal on how the contracting facility was cooking the books around staffing levels to look like things were on the up and up.