I haven't come across a single image or video editor that doesn't support webp nowadays. I use paint.net, krita, aseprite, inkscape, ibis paint x, opentoonz, and davinci resolve, plus libreoffice if you count that, they all support importing/exporting and editing webp just as any other image file format. I'm pretty sure GIMP and Photoshop do too but I don't use them so I can't say for sure

I feel like a majority of people have to go out of their way to make webp an inconvenience in the modern day.

Besides, if it for some reason doesn't work in a specific situation you need it you can just manually change the extension to ".jpeg" or ".png" and Windows/Linux/Android file managers will automatically convert it. But I can guess most people don't actually face a situation like that.