Bendtner's strike made it five successive matches in which the Gunners have scored in second-half injury-time.
"Maybe it is not good for my heart, but for the championship it is not bad," added Wenger.
Bendtner missed a host of chances in the Gunners' 3-1 league victory over Burnley at the Emirates last Saturday.
However he claimed a hat-trick in the 5-0 Champions League leg demolition of Porto on Tuesday and has now scored six goals in his last five games.
Hull's equaliser came from the penalty spot after Sol Campbell was adjudged to have brought down a seemingly offside Jan Vennegoor of Hesselink. Wenger conceded that Campbell had fouled the striker, but also backed referee Andre Marriner's decision to only show a yellow card.
Improved finishing pleases Bendtner
His Hull counterpart Phil Brown, who saw his captain George Boateng dismissed for a second yellow card later in the game, disagreed.
"The pivotal moment was undoubtedly in favour of Arsenal," said Brown.
"He should have been red-carded, it's as simple as that.
"He's denied a goal-scoring opportunity and under the letter of the law, he should have been red-carded.
"These players can hold their heads up high because of the determination and the pride in the performance they put in.
"Ten men have harried and chased one of the best teams in the country, if not in Europe, if not in the world."
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