It seems to me that some folk on here have misunderstood, or misread, a recent post?
Did you read what @AlphaTransWoman actually wrote? They are agreeing with you. As far as I can see.
It occurs to me that some of you saw their username and your own prejudice stopped you reading their post properly. I hope I am wrong 


@Mommyisnotsilent the seat-belt thing is just normal 3-year-old behaviour. I've had it with my own DC, and my friends' DC. Between the ages of 2 and 4, children are learning how to be them, in charge of themselves. They don't know why they have to wear a seatbelt. They only know they don't want to, and they are also working out that they have the option of not doing what their parent wants.
This is easily dealt with, quite quickly. It requires patience when you are doing it, but the DC will learn that you mean business either the first time, or the second. It is about consequences.
So you are in the car, and the DC won't put their seatbelt on. (Or in another variation, you are in the car going somewhere, and they have taken their seatbelt off. In which case you pull over safely as soon as you can.)
Nothing is more important than your child's life. Not getting to the shops in time, not meeting someone off a train. So nothing is more important than your child always wearing a seatbelt while you are driving. It is so important, that if they are not wearing their seatbelt, you will not drive the car.
2 and 3 years understand language, so you can tell them "we will stay here then, until you put your seatbelt on." You can even discuss it with them then, they may come up with some surprisingly good reasons.
However, you want to get going. So you say something like "we have to go to the shops/pick up your sister/ie purpose of journey. And I can't/won't drive the car/We're not going anywhere until you put your seatbelt on."
(Trying to show in my example above that you can tailor your words how you like. Depending on the child, you might say "OK sunshine, we're not going anywhere until you put your seatbelt on.")
Repeat, and they will eventually give in and put their seatbelt on. Continue with your day as normal. Do not have any further discussion. You are trying to make putting the seatbelt on a thing that you just do when you are in a car, like grown ups/Mummy does. And you are doing it by consequences - if seatbelt on, then Mummy will drive. if seatbelt off Mummy will not drive.
No need to explain what Mummy is thinking, which is basically this
If Mummy drives with DC in car, and DC does not have seatbelt on, and Mummy has an accident, and it's a bad accident, DC could die. Therefore Mummy will not drive with DC in car unless DC has seatbelt on.
As for the "I want my Daddy/other carer" thing, that's normal for this age as well. Many a frazzled mother/father has had to deal with their DC yelling loudly "I want my Daddy/Mummy" (the Other One). I am sure my two lesbian friends, one of whom gave birth to their two DC, had the same problem. When looking after them, I'm sure Amy will have heard "I want Hannah!", and Hannah will have heard "I want Amy!" It feels hurtful the first time they do it, but then you learn to see through it
I hope this reassures you a little. Please don't blame perfectly normal child behaviour on the family situation IYSWIM.