Ignorance ruins others' future

Everyone's ambitions and dreams constantly change, and that's completely fine, people continuously grow and bloom like flowers, whether they become venomous or a cure to something. My classmate used to wish to become a marine biologist, and I thought it was fascinating, despite not wanting to go on the same path as her. Obviously for that, she needs to study biology and other things that I'm unsure of. So, why are there others who keep disrupting classes? 

You might want another path, and frankly I don't care if you do. However, the world doesn't revolve around you and your puny brain. But I guess in a way it does, others join your antics. If someone does call you out on it, do not start pointing fingers on who talked first, they just want you to stop talking which is obvious, surprisingly not obvious for you though. I do agree that school doesn't determine intelligence, but it still plays an important role of your life or someone else's.

Personally, at some point in my life I was playing on getting away from society and living in a cabin that I will build myself, meaning that school wouldn't be of such importance to me, but I understand that someone in here might want to become a surgeon which is why I stay quiet when it's a lesson that might be of importance to someone instead of running my mouth constantly. And your idiotic and meaningless words might just wipe away the literal basics of a topic to someone who was looking forward to it. They may forget about it, or exhaust themselves even more when they return back home, learning for hours again.

Do you even have a life ahead of you? Do you know what your dreams even are? Because honestly if you did care, you would emphasize with another person. I understand some focus on their present more than their future, but they still acknowledge what could be. And your ignorance, might also be your own destruction.

I didn't really know what tag to put this in, I was originally going to put it in philosophy but this sounds more like a rant, so it's in this category.