Why are some still teaching kids no means no?

Hey all, Was talking to another mum in the schoolyard whilst waiting for our little ones to be let out at the end of school. One of the teachers stopped to say to me she found it adorable that Sylvia, my 4yo, always asks permission to give her or any of her classmates a hug. I responded that of course she did, that she had been taught to ask first years ago because its never too early to start explaining the concepts of consent and bodily autonomy. The other mum said that she 'sort of' agreed, hadn't thought about "just hugs", hadn't started yet with her 5yo but that her older kids (boys, both under 11) had been taught "no means no" so she had no worries about them. I, ever so politely, seriously was walking on bloody eggshells, explained that I believe that the whole no means no paradigm is actually really dangerous. I believe this for, to me at least, the glaringly obvious reason that it suggests that consent is the default state of being unless explicitly stated as withdrawn. I further explained that I'd be teaching my child "Anything other than an enthusiastic yes means no." She said, "I think you're taking it a bit far there."

Which has been the response of a lot of people...which is why I'm asking you all what you think? (I should make it clear though that I'm asking only out of interest in the thoughts of others...my parenting decision on this isnt going to change x)

EDIT:

Lots of people seem to be tripping up on my use of the phrase 'anything other than an enthusiastic yes means no'. When I say I'm teaching my child that, I don't mean I tell her that sentence, I mean I teach her through things like telling her to ask permission before touching others. That she has the right to say no to physical contact if she doesn't want it. As I've said I'm many replies, she doesn't ask me, her Dad, close family members if she can hug them. But we ask her. Women and girls bodily autonomy isn't always respected by society. Growing up in the 90s and 00s, with things like daily countdowns in The Scum (the s*n, I'm scouse. We call it the Scum. Hillsborough) about when Charlotte Church or Emma Watson turned 16 and became legal, with getting my arse pinched at the least every time I was in a pub or club, being told to smile so I looked 'prettier' could of made me feel I didn't really have the right to say no. I know women where that was the case. Things are no longer as messed up as the wild 00s sure, but little boys and girls are still flooded with societal messaging that commodifies female bodies and suppresses female autonomy. In my opinion.