While on a computer, text selection doesn’t typically summon a pop up, it’s needed in mobile because how else would you easily get to copy and paste? Everyone else would rage at the loss of the tooltip and any other interaction would be painfully hidden if it was delegated to a combo of pressing your lock buttons or volume buttons while highlighting text.

The complaint is specifically about desktop text selection though, the screenshot above says "i select text using my mouse". I agree that removing the pop-up UI from mobile would suck, well suck more than mobile text selection already does.

Quick edit: didn’t see the screenshot of the widget, might be the site you’re using, or browser? Also any adblocker add on should be able to hide those elements.

You're right, putting ##.quote-share-buttons in my uBlock filter list got rid of it. Still, blocking all these elements myself is really laborious.