It’s the same as with Linux, GIMP, LibreOffice or OnlyOffice. Some people are so used to their routines that they expect everything to work the same and get easily pissed when not.
Well its still not a image manipulation feature missing. It’s a workflow feature. You could also just copy a layer. But in the end, Photoshop has no image manipulation feature that is really missing in GIMP, you can export the same result picture.
Right so you’ve validated my point that it’s not a Photoshop alternative.
Look at it like two cars. One is automatic and the other has a stick shift. In the end what I am talking about is the transportation. Both cars drive the same speed and arrive at the same time, but driving stick requires a different workflow, then driving automatic. But that does not mean, stick shift is no alternative to an automatic.