Paying $X per month and allowing family and friends to watch is both convenient and cheap enough so it doesn't bother you. It's like paying for electricity in a family house.
But when you are forced to be the only user of your paid account you evaluate if the cost for using a service 5-10 hours a month is truly justified.
Degrading people as "children" is not an interesting analysis. It's obvious that Netflix made their bed by flirting with users that like account sharing (long ago). It will not be easy to take that away now.