Yeah, that tracks. Robocop is a satire of 80s white flight and drug hysteria, but it has a plot, Murphy's lost humanity, enslavement, and struggle to define who he is gives him some depth and pathos. The badguys are ridiculously ghoulish and over the top, everyone is chewing the scenery, the special effects are fun.
But with starship troopers, fash media is fash media, so once you get the joke, the impact is made and i can see how it'd lose a lot of it's appeal.
For me, there's a lot of nostalgia and quotability to it, that's a lot of what I like, rather than watching it for plot.