Because it's been done and probably won't help with our constellation of orbital debris one bit, but it hasn't done what it did to Clooney et al (it still could cause a cascade, but then so could any other random bit of debris that was already there).
What I find most worrying is, as seemingly revealed by the shuffling of participants in that spacewalk the other day, they might not be able to put everybody in a space-suit in an (slow-enough developing but inevitable) emergency. One sort of assumed they had kit enough for at least transfer between modules the wrong side of a breached central hub, should they find themselves needing to, without needing to do double-duty with some of them (undonning them and getting a still-suited colleague to take them back for the next wearer).
So maybe in such a slow-emergency they'd make do with slightly awkward sizings, and less fuss about the need for comfortably-fitting equipment for extended work, but emergencies don't tend to even be that slow (Russian-style microleaks aside) so you tend to imagine there'd be a set of good-enough-to-leap-into suits of at least the same number as the crew (but ideally a multiple of that, sets placed round the rig in whatever spare internal space they can cram them into).
Or maybe it's just not worth it given the number/proportion of scenarios where the emergency is basically so quick there's no chance at all of doing anything about it. Cost/benefit actuarial analysis doesn't justify the space and weight needed, so they only have two each of the US and Russian 'spacewalk' suits, and would rely on their individual limited-protection 'travel' suit for any very brief episodes of depressurised exposure protection (no real thermal maintenance or micrometeoroid-armouring)..
It's a corner I'm not comfortable to find being cut. But I'm not the one trained to take account of the risks.