Yes hard to do but thatís a good thing same with Squats and dead lifts. I used to love chins and dead lifts perhaps im mad, Being honest I hated Squats but I always did them as I knew they were the best thing you could do to grow. front and back right down ass to ground.
I hope to get back to all of them soon once my back improves. At present im 205 Ibls at 5,8 once I loose some excess weight and build up strength ill be ditching pulldowns for chins. Perhaps some guys feel that they cant do enough reps and are afraid to look stupid in the gym basically because of pride. The only person ive seen chin at my gym in the past 7 weeks since I resumed training was a young guy around 17 who did a set. Thereís a lot of big powelifters who hog the squat rack as their own but they never go near the chin up bar I reckon thereís dust on it