While the check-raise from another player is unlikely, are you really wanting to go to war with top set when you can't get a majority of your stack in beforehand? If you check then re-pot, Hero still has $100 in his stack with around a $40 - $45 pot if called by the cutoff. If a black deuce rolls off on the turn, you can't even get the rest of your stack in.
If you just flat and go heads up, the pot is only $15. Much easier to play as you don't have much invested and you can check/call on any turn.
And just to add to your reasoning: deception.