I'm not sure I'm understanding correctly but I believe some pros have done demonstrations against weaker amateurs (15k?) with something like 25 stones. Yes it'd be fun to see AlphaGo take pros with huge handicaps. And even inside handicaps there's alternatives. Like free placements vs just on star points. AlphaGo against a pro that starts with two stones in each corner could be neat. At some point I'd imagine the pro associations might balk at such games though.