[Masquerade]

The problem with JJ is not so much that it isnt a strong hand, its that you cant tell easily if its good as one or two overcards will usually flop.

Picking random hands against it and running simulations to river is one thing but you have to consider live play. Is someone with JJ going to call to river with an A and Q showing and someone showing strength?

In a way it's similar to why Ace-rag is no good. If you run simulations you'll find Ace-rag performs reasonably well, but in a real game where it misses the flop you'll have to fold it to anyone betting a draw even though its the best hand right now.

Conversely JJ and Ace-rag arent bad allin hands in a NL tourney if youre short-stacked as you will go to river.