Hmh? Picard was targeted for his skill set. He himself basically engineered the bringing aboard of Riker. And even if this was only made possible by the stubborn insistence of the XO at going after his boss, this is hardly an unrealistic turn of events.
Or perhaps "unlikely" would be the better expression there. Of course it's unrealistic for a starship skipper to be allowed to do what he wishes - but no more unrealistic than the existence of starships in the first place. And those are not Hollywood conceits in the generic sense, but specific root concepts of this piece of fiction, akin to a cop always having a dead wife and a drinking problem and a nemesis to be defeated in a boss fight that somehow solves the previous two problems, too.
In any case, it makes good in-universe sense. Unlike, say, this specific and specifically disadvantaged search team beating a dozen others to the job. Then again, "Gambit" was spelled out for us, while they tried to slip "Descent II" past us. Which is the real shame here, because there could have been dramatic worth in Picard being targeted here specifically by either Lore or Hugh, or practical worth in allowing for the bit of filler where Ensign Ricky finds the Borg and Picard is vectored to assist (Trek two-parters aren't exactly filled to the brim).
Timo Saloniemi