A couple I'm friends with had a broken kitchen faucet handle for ages-- it would just fall off unless you held it on while operating the faucet. Unfortunately, one of the necessary connector pieces was no longer available, so it wasn't a trivial fix. Once, when I was pet sitting their rabbits, I got so annoyed by the thing that I went home and made a wooden piece to fit in where the missing part went, and fixed it while they were still on vacation. It was supposed to be a surprise but I totally forgot about it, and a few months later my wife said to them "hey do you like having your kitchen faucet fixed?" They looked at her, perplexed, walked over to the kitchen faucet, tried to pull it off, and it obviously didn't come off. They were shocked! Why? Because they were so used to holding that damned handle on the faucet that it just became an part of their using that faucet.
Similarly, people get used to bad interfaces. While we are always going to be most productive using interfaces that we're used to, that often mistakenly leads them to believe that they're objectively good. If you ask nearly any group of professional photographers how many hate Adobe, most will raise their hands. Ask them how many have used Gimp, they'll almost all raise their hand. If you ask them how many used Gimp more than once, they'll almost all lower them. Ask them why, and they will almost guaranteed cite the poor interface. While many dedicated and experienced FOSS developers (which I am) will cite Adobe's marketing practices as the reason people use Photoshop instead of Gimp, I call bullshit. You'll find many more photographers using Affinity Photo than Gimp, and considering Gimp is free, that says a lot. Who will you find using Gimp? Developers that need a photo editor. Why? They're so used to holding on the faucet that they don't even recognize when they see a properly working one. (And they'll often get really mad for even implying it needs to be fixed.) You also don't see that split with Inkscape. Most people who professionally work with vector art choose Illustrator as their primary tool, but most of them cite exactly the reasons developers assume people continue to use photoshop: overall smoothness, ecosystem integration, file type compatibility, etc. There are some legitimate shortcomings in Inkscape-- the type tools are just not as good which matters for graphic designers, for example. But lots of people who do vector art professionally do use inkscape.