Most native Linux apps have absolutely shit keyboard navigation and screen reader support, if they even bothered testing it at all. So yes web apps are far better for accessibility.
I'm sick of purists who don't know they're talking about. If it was up to you there'd be zero growth in Linux and you'd actually be happy with that. Electron exists to put software on multiple OSes at low cost. It's a good thing. App devs are just jealous that they're getting replaced by web and mobile devs, both of whom they've shat on for decades.
Karma's a bitch. It isn't the 90s anymore, the time to move on and learn a worthwhile stack was 15 years ago. If you're so good then surely you can bring your genius level skills to a web team and show them how it's done.