I'd interpret it only as saying what it says.
I think the key word is COULD - if you fly over 100000 miles on all your programs (including your Aeroflot program, Biman Bangladesh FF program and Khazakstan Airways) you COULD earn 1K status by concentrating all your travel on StarAlliance carriers instead. What I feel is implied but not stated is that they all need to be credited to MileagePlus - that is after all a pretty fundamental rule of MileagePlus (and all frequent flyer programs). You only get recognition for flights that you have credited to your MP account.