And if good habits are not instilled, they will have a difficult life ahead of them. It's far easier to learn those habits when young, than to try to independently course correct as an adult.
Not coercing a child towards correct behaviours, is doing them a great disservice. In some circumstances, it's child abuse to not coerce those bahaviours.
There's a huge difference between a loving parent gently but firmly teaching their kid to clean their teeth every day even though they don't want to, and a brutal schoolteacher beating facts into a class full of miserable kids.
There is in fact little difference between "you have to learn these things" and "brushing your teeth".