Everyone has a hand in choosing their opponents, they can either say yes to the options presented to them or they can say no. Has Conor said yes or no?
Conor has created the position he's in where he has more viable options to agree to than most fighters do. He's not hand picking, he's created those opportunities along the way so he has more options that the ufc are willing to put on.
It also helps that the fish are clambering over each other to jump into the boat because of the payday it means to fight him, which again is value he himself has created. He has options because he created them along the way, so even in your perspective of no one being presented with the offers he has, he's still unique for having gotten himself into the position of having them available to him on this sort of notice.
But frankly, i don't recall anyone doing anything remotely similar in the past. Everyone waits for the title shot or the preparation time for a new opponent when they have something to lose in terms of legacy/titles etc