I'd used D1 probably because at some point in the past I might have tried a high string and got D2ed comboed heh. D1 is fastest move. So online I see what D1 will hit.uh. nut punch is hella punishable bro. Your just hitting d1 (why the hell you would punish nut punch with d1 I have no idea) too slowly. Turn on the thing that simulates online lag and go to practice mode.
If you are too slow even scorpions teleport is "safe" by this definition lol.
Speaking of Scorpion's teleport have been times in the past where I blocked it and hit uppercut and it was safe. Other times it was fine.
But sure practicing with lag input on is a thing...I used that some back when I played Tekken and found some of the heavier lag input felt similar to some things i experienced online. Tekken players swore the online was perfect tho.
Just MK11 could just be better designed punishment-wise.