Why WebP files cause trouble
WebP exists to make websites faster. It stores the same picture in a smaller file than JPG, so pages load quicker and use less data. That is genuinely useful, and it is why most large sites now serve WebP.
The friction appears the moment you save one. You right-click an image, get a .webp, and then find your photo editor will not open it, the printing service rejects it, or the job application form only accepts JPG. The web moved on faster than the software on your desktop.
JPG is the safest possible answer. It has been universally supported for three decades, and nothing you are likely to use will refuse it.