It doesn't show that your mum did a good job, it suggests that you are from a community where sexual abuse is relatively common, and you frame it as your mum having to defend against it. Which doesn't mean it doesn't exist elsewhere. That level of distrust outside a community is controlling and isolating.
I regularly meet travellers. We have a large community a mile away. My child went to school with traveller kids. There is no way I would wander in and start asking random questions - I think that would be rude and condescending. I don't know if there are threats - certainly the police are there a lot. I've never seen a TV show about travellers, so I can't compare. My experiences are all in person.
The women never speak, not even hello, and never go out alone. I find the constant hustle from traveller men exhausting. I admire it, because I hate doing it, but it's really tiring when someone haggles for stuff you aren't even selling, constantly, one thing after another, before you've finished the last one. I find the treatment of animals to be severely lacking and there is a lot of flagrant disregard for very basic rules and norms. Some things don't matter, like doing the school run in your pyjamas. And some things do, like parking on the yellow zig zags, not putting children in car seats and littering. It's pretty antisocial, illegal and how you can justify not letting a child sleep over somewhere because of a possible (but very unlikely and not specific) risk of sexual assault and then drive them around without a seatbelt on is complete proof that this isolation is nothing to do with children's best interests. It's to do with perpetuating cycles of access to women and children to exploit and that's framed as 'protect and provide'. And it's as old as time.
The man predominantly going to work and the women staying at home raising the children IS isolating. Schools and workplaces allow exposure to different cultural norms, not just 'bad habits'. And while of course some habits are bad, the worst of all is realising there is another way of life. Or 'disobediance' Women quickly stop tolerating that if they are exposed to alternatives, unless their access is limited by pretending people outside the community are sexual predators (which is how you are bringing your children up. Protection from a threat by isolation where the threat is manufactured is not protection. Its control) And by not engaging in education, young people are deprived of the qualifications and skills needed to make a life elsewhere, and of the chance to make a comparison by seeing other people's homes and realising that what they have been told by their elders isn't necessarily the case. And suppose a girl does decide she isn't going to stay home? What's she going to do? None of the girls even go to high school and they boys rarely get GCSEs. That's really powerful and very limiting. Especially for girls.