Each child, when he grows older, can then make an informed decision about whether to adopt his parents’ faith.
That may be true but if he/she chooses not to be a JW then as soon as they are legally adult (18 in UK) the parents will be expected to boot them out. That was made very clear in a convention video a couple of years ago. Phone home if you're in trouble, don't expect your call to be answered. Having been raised in a family where you are strongly discouraged from forming non-JW friendships you are going to be very lonely. Chances are you have been similarly discouraged from a University education so that will affect your future finances. So, yes you can leave but we will make life as hellish as possible!
George