That mysterious shooter hadn't bled after he was hit in the shoulder; clearly, he had been wearing some sort of bulletproof vest as well.
In conclusion, both of them suffered injuries in the brief fight, but Luke's were heavier.
Without Elementary Self-Healing, he would've had to wait for an ambulance after he was shot the first time.
Thank god he had learned Elementary Self-Healing for fear of possibly dying in strange or unusual ways someday.
This wasn't a game or a movie.
When Tony ran into Whiplash, Whiplash at least wasted some time talking so that Tony had time to put on his suit.
However, this shooter could easily shoot Luke from eight hundred meters away without giving him a chance to speak.
For Luke, who had a system, he could continue to get stronger as long as he was alive.
This case was already quite huge after the death of ten SWAT members.