It saves a ton of time. I’ve worked with clients before and I’ll put a lorem ipsum as a placeholder for text they’re supposed to provide. Then the client will send me a note saying there’s a mistake and the text needs to be in English. If the text is almost close enough to what the client wants, they might actually read it and send edits if you’re lucky.
They messed up 10 years ago when for some reason it took ages for Firefox to load compared to Chrome, and sadly it never really recovered the user base even though the performance is vastly improved.