It's counted as Muscle Strengthening Activity, though.
'Examples of muscle-strengthening activities include:
carrying heavy shopping bags
...<snip>
heavy gardening, such as digging and shovelling
wheeling a wheelchair
lifting and carrying children'
Seems like they've made a point of thinking of things women do more that count as a form of exercise.
If you combine it with some of the examples of vigorous to very vigorous activity, you've got something a lot of us did or do (living in a flat with no lift, for example) - carrying children and heavy shopping upstairs.
I don't see why people are feeling annoyed about the data. There's no moral values attached to it, it's just reporting what those few thousand women said when they responded to the survey, that pretty much half said they haven't done anything in the last year and their main reason is lacking motivation, not lacking time or because the social barriers are higher for women.
Eighteen months ago, my exercise was sitting back in my office chair and trying to find my lower abdominal muscles. They weren't just weak, they were numb - I genuinely couldn't feel a thing. Well, except for pain in my lower back when I was sleeping, sitting, walking, standing - but from my abdominals? Absolutely nothing. Over weeks-months, I gradually became aware of them. Now I go to the gym 3-4 times a week (30 mins to an hour usually), can walk much further and whilst I'm not going to stop having autoimmune and connective tissue disease, at least they aren't being made far less tolerable by not being as strong or as fit as I can be. And I get treated like bloody royalty when I do need physio appointments. Which is always nice.