1st: that's limited to the US

2nd: it's not the same that "most of them have a bachelor degree" than "it's required to have a bachelor degree". Most people think they need to have it and that's why they get one, and then they start as everybody else being juniors and having a boss younger than them. Once you get your first job it doesn't make any difference and it's better to spend time earning money and getting experience instead of wasting money and time on useless knowledge.