If CCP made the site so that there is only the initial spawn, then, naturally, the solution is to clear the rats in a combat ship first. And, if CCP made the site so that the rats periodically respawn, you need to make friends.
And no, I do not think that all content should be solo-able, as that would require compromising your group content for those that enjoy it.
Anyway, try to see if you can find information about the rats respawning. And, if you can’t find anything, you need to do a “science fleet” -i.e clear out the rats in a combat ship, and wait long enough that you’re sure nothing is going to respawn. Maybe bring an Mobile Depot and cloak, then you can eat dinner or whatnot while you wait.
Also, I’m not exactly sure why this is something to @ random CSM’s about, as this seems like something for the players to figure out.
Edit: Resonance of War said he figured out how to run the sites solo in this guys other thread… where OP whines even more.