Ehh. To be honest, I really don't care about solving every little issue. Like, no offence to Frog, but I really doubt this quest will even get proper ending, especially considering it's format, unless of course Frog is very dedicated.
Like, remember, we influence the details not the picture, so technically we really don't have to defend Agri-worlds, as not doing it, ultimately wouldn't change anything, as things will stay the same no matter what.
True but White Scars are perfect for delivering food to other planets
That's not Space Marine job. Unless Chapter is incredibly down to earth and close with Humans and decides to fucking volunteer it's ship just to deliver shipments of food...Yeah. Even, the most friendly, close to baseline Humans Chapter is unlikely to deliver food, simply because they have better things to do with their stuff than use their spaceships as transporters.
That sounds more like the escort specialists.
It wouldn't be their job either. Escort will protect ships, you know, do job that makes perfect sense for military organization like Space Marine Chapter to do, not directly transport fucking grain or livestock from one planet to another, it just isn't their job.