That is precisely my point. I am a bit afraid that the game betrays the players wishes in that regard. If a player comes to me saying "I want to play a wookie" why he wants to play a wookie? Probably is because he has seen the movies and he wants to play a big strong wookie who is also a faithful companion.
My fears are that the game mechanics won't provide enough coverage to the "strong" part for his (our) picture of how a wookie is. Said that, I haven't played yet, I am still in the process of reading the book, but, I will probably rise the limit of wookie Brawn up to 7. It will create the ilusion that wookies are stronger than other races, and I say ilusion because reaching Brawn 7 would cost at least finishing two talent trees.
My two cents,
Play the game then worry about this. The wookiees 'feel' like very physical characters.