yuji sacrificed physical damage with a binding vow to strengthen his soul "damage"

"yuji has no physical damage cuz the target is the soul,he didnt specifically sacrifice physical damage its just not there"

its the same for open domains.you didnt "sacrifice" the barrier,you simply used it barrierless cuz you can but you still gain the range from the binding vow.

binding vows with oneself are ways to cheat the system,theyre not a fair exchange unless its done with other people.

this binding vow to strengthen soul "damage" was only possible through a ct,you cant change the target of your literal physical punch,you can with cts tho.nanami and sukuna did it.going by the same tactic he "sacrificed" physical damage to gain soul "damage"