Actually bud, there is a rule that a bowler cannot deliberately attempt to intimidate a batsman by bowling short if the batsman is not very good.
Would like to see reference for such a rule which takes batsman's skill into account - can't see how it can be enforceable. If a debutant comes into crease and during first ball (when no one knows what skill the batsman has), how will bowler know the batsman's ability before deciding whether the short ball can be bowled or not? If there is a good batsman but is woefully out of form that short ball could injure him, is bowler allowed to bowl short in that case? Also a batsman can be very good batsman for fuller balls but very bad with short ball that he could get injured with it - is bowler allowed to bowl short in this case? So many cases come into play with such a rule that the rule falls apart.
The umpire must consider the bowling speed and the batters ability and make a determination as to whether the bowler is attempting to deliberately intimidate or injure.
It we are all sure it was deliberate, why didn't the umpire make a determination that it was deliberate in this case? Surely they have all the 360 degrees cameras and replays that they can use to find out if they wanted to.
Given that Bumrah only bowled 2 no balls in the entire innings, I suspect bowling 4 in an over wasn�t accidental.
Maybe it was deliberate. Maybe the heat of the moment could have caused it. Maybe trying to bowl too fast could have caused it. Thing is we don't know for sure to conclude it is deliberate and umpire didn't deem it deliberate either.
Also there is no stat that says one would spread out the no balls evenly throughout the game.