The reason people suggest that you should “go into politics yourself if you’re so smart” is because they know you can’t change anything through our democratic institutions.
Deep down it is internalized by every individual of our “democratic” capitalist nation states that the very institutions they elect don’t exist to bring change, and that your ideas, inspired by systemic change, class consciousness, and the understanding that the world, as well as our economy, can and should function for us all, not the few one percent birthed into positions they never earned, deep down they understand that such ideas will be rejected by said institutions. That your blood, spirit, and hard work is wasted if you attempt to bring change through our democratic institutions built and mostly controlled by those who wouldn’t benefit from change, to put it lightly. From the very moment you learn about politics, you’re indoctrinated by the idea that the institutions built by our government are the only ones you’re allowed to bring change through, and anything else is silly or impossible, despite historically the opposite being correct.
To end it with a quote:
Nobody in the world, nobody in history, has ever gotten their freedom by appealing to the moral sense of the people who were oppressing them.
Assata Shakur
@Erik
I agree completely 
So, why do I get the feeling, that you don't share many political beliefs with me at all?
Because most people recognize the same problems accurately, but in a fit of rage decide to project their rage onto constructed enemy figures like refugees or Muslims and punch down, instead of fighting against the systemic structures that oppress all of us.
@Erik
Well, at least you're not lying about the hell you want to live in.
That's rare
Hey, one honest person to the next: one of your pinned posts is a Nazi telling a trans person that he needs to kill them, the Nazi being portrayed as the good guy.
So, whatever your hell is must be a paradise to everyone else!
If all things go well, absolutely!