That depends. To me, if you are developing an actual app, you should not be able to select text by default - its too easy to do by accident. If you're doing edi

That depends. To me, if you are developing an actual app, you should not be able to select text by default - its too easy to do by accident. If you're doing editing or there's an error message, those are exceptions and of course you should be able to copy those. If what you're doing is an interactive website with texts like an article or a story, I think you should be able to copy by default, but UI elements like buttons should not have it enabled.