even if they are not correct for every single person in the generalised group

That’s your problem, you’re willing to lump everyone together. I can also go around looking at every minutia and flaw I can find from different people and lumping them all together under the “Women” umbrella, but I don’t because I’m not fucking stupid. Tell me again the percentage of the male population that does each and every single different thing you claim all men do? That’s right, it’s a fraction of a percentage. Most men are good. And yet “all men” enter your generalisation.