It's so much easier - and feels smarter - to just come up with your own opinion on a subject. If you're a reasonably intelligent person otherwise you might even produce a consistent idea. But this consistent idea is not original. Everyone is informed by the ideology they grew up in and our specific neoliberal ideology grooms critical thought in a specific way.
It's not their fault, though. The only way they could possibly be cognizant of this is if they read political theory - oh wait.
I'm talking based on my interpretation of my own journey. Even when I started absorbing marxist talking points from youtube videos and shit I still told myself I didn't need to ready the theory. I assumed any sufficiently good idea can be summarized. So when I ran against barriers in my thinking, I just assumed Marxism was too outdated to be applied, or that they were just bad ideas.
It was years until I actually picked up Marx's works, dusted off the notes section, and spent the time actually reading it. It was only then that I realized I had no actual understanding of Marxism before. I just had buzzwords and talking points. It would have been so easy for me to manipulate those buzzwords and talking points to serve whatever worldview I pleased. Like, for example, that Marxism is about controlling subjects and not class analysis.
I probably would have even seemed really smart doing it.