Yes, you still shoot bugs and robots.
But the planets that are available- and by extension the missions - change all the time. You can’t just mainline the game for 150 hours in a week and experience all of it.
Most of the people complaining about the lack of variance in gameplay are the ones playing 12 hours a day constantly.
The devs hate the requirement too: https://www.reddit.com/r/Helldivers/comments/1cjyll7/some_discord_updates/
This is 100% a Sony thing
Just check how much money GTA online has made for Rockstar every year. It’s an 11 year old game that makes half a BILLION dollars yearly.
No wonder they’re not in a hurry to get GTA 6 out. It MUST be better than GTA online both for gameplay and microtransactions as well as have the tech for live service