Earlier quoted context omitted.
why not GIMP and Inkscape?
Not sure why you're being downvoted. This is a legitimate question. Although my sibling comment might offer an explanation to your downvotes. Edit: HN's really gone downhill. I thought we didn't downvote with feelings around here? All I did was point out that it's a legitimate question for people who don't have much experience with Photoshop, GIMP, etc.
Similarly GIMP has a lot of oddities that Adobe would have found unacceptable in Photoshop versions released 25 years ago. You can do real work in GIMP, but the polish just isn't there.