Wenger said: "Bentley is entitled to his opinion but it does not mean he is right.
"What is important is what the player really wants. When you are in one of the biggest clubs in the world you have to accept competition and if you accept it, it makes you better. If you move down you are down, not at the top.
"I believe Theo can establish himself here. He is 18 and at that age to play in one of the biggest clubs in the world in a regular position is very difficult.
"As a striker he has one big quality. When he comes on he makes a big impact. He's not there completely yet when he starts a game but that is transitional.
"Very soon he will have the same impact when he starts. You cannot interrupt that kind of progression and development of a player. You can get lost by moving.
"Between 18 and 20 a player develops. When I took Nicolas Anelka at 17 for the first few months he looked completely behind the team and then in three months he became in front of Ian Wright."