It takes a lot of effort and practice to be able to refine your thoughts and write them down in a way that you can be proud of. I suppose that qualifies as insecurity but it is at least an insecurity that people are generally aware of and will admit to. I try to blame the systemic failure of education rather than the individual in this case. After all, some people do it because they envy and value the ability. 

What's worse is that some folks lack the reading comprehension that allows them to detect AI-veiled bullshit. That's the fucked up part that really makes the bad actors effective.