Whether or not the game needs this anti-cheat feature, players are still finding ways to give other players huge amounts of Samples (a grindable resource with limited amounts included in each mission) and spawn in unreleased equipment and stratagems.
So clearly the GameGuard isn’t as useful as it could be.
I damned those bugs myself with a combo of napalm, flamethrower, and incendiary breaker.
But in all seriousness there are some huge bugs that can ruin a run you spent almost 40 minutes on… So I also bring a 500kg to deal with those.