No not everyone will go to university, nor do they want to and that's fine, but they should at least be given a chance at doing whatever they want in life.
It's easy to say, once you become an adult you can become whatever you want, however if the system has failed all the way up to that point, the stats show that very few people are able to make up that ground later in life. However if the system in place helps catch most of those that would fall through the (giant) cracks, then many more children and young adults would get a better start at life.
Even those from wealthier families benefit if there is a great health system, better social supports for mums and dads, great maternity leave, good free child care, a good mental health system, a lot of social aid in the way of support for domestic violence and alcoholism. Also more money put into education, so that every child no matter the school got good assistance and lots of help when they started to fall behind. All families would benefit from that.
I know just looking at my daughter and her friends from high school, a few of them sadly have not much chance at getting ahead. I know my daughter had a great head start, because I cared about her, I provided her everything she needed, I wanted her to get educated, I fed her good food, I clothed her, I taught her how to conduct herself in the workplace and so on. She's one of the lucky ones.
My son is struggling with English, and I work with him every day for about 45 - and hour, reading and doing English homework. He's also in an assisted reading program and has come ahead a long way this year, because of all of the efforts of myself and his teachers. He will be OK, however Many kids don't get that.