No, there are those big plus signs appearing on the top-right corner of the icon, if you click there it selects instead of opening. I guess it's a matter of habit, I can't get used to it
Or you drag over the files. Or press something like Strg or Shift while clicking. I mean you have to do that anyways, even with double-click per default or you'd lose focus on the first file. And it's rarely the case that you just want to focus a single file.
Ah okay, I can see that being useful. Seems we have a different workflow. I rarely look at that extra info at the bottom. Usually just to see how many files I selected and their total size. If I'm concerned with single files, I either don't care for the size and extra info, or I switch to the list view and have it displayed next to each file if I'm organizing stuff. I'll also sort them by size or whatever in that case. But I'm not concerned with the exact file info while doing regular stuff. So I wouldn't use that use-case for a single-click very often.