While I agree that using raster applications for vector drawing is intrinsically illogical, the developers have to an extent fed that illogic, by including tools (such as text and drawing) that possibly shouldn't be there. The fact that they can't do it usably is the sin, not the expectation of users that it should 'work' intuitively.
And drawing a vector in one application, exporting as an intermediate file, and importing into another application is a PITA. A workable/non-crashable version of 'live update' is more usable, but the most intuitive approach is to have it all there, in one application.
I think the piracy and 'used for everything' are different issues, not linked...other than by people's inability to grasp what a tool is intended for possibly being linked to their level of morality.
The funny thing is that on DPR, most people complaining about Adobe's licensing changes are using PS for photo editing, when there are better applications out there. PS shines when you want to do something more that colour correction or cropping, especially in terms of montage or advanced image editing. I'd be surprised if more that 10% of PS users use it to the best of its capabilities.