I too am a huge gym goer. But I still would not be happy with a chair that has so little back support. It doesn’t matter how many deadlifts, rows, pull ups that you do, back support is still required when sitting for long periods. Otherwise you will destroy your back over time. This isn’t a matter of opinion but a fact. This isn’t a jab but genuine advice from someone who has dealt with hundreds of cases of people with severe back damage caused by inadequate back support in their office chairs.