He wasn't exactly on a schedule, but he did think he needed to take care of them quickly, most importantly, he didn't want them to escape.
Humans tend to escape from things they deem unconquerable or unachievable, so the moment they think their plans are not working is the moment they plan their escape.
He didn't want that. What he wanted was a clean victory with fifteen dead bodies as collateral damage.
'...but Those bullets…'.
The moment he stepped into the light would be the moment his death would be on countdown.
He couldn't dodge all of it; the bullets were too fast, and he was only a ninth star.
If he were faster…like a tenth star or even an eleventh.
'Oh….' A smile formed on his face in realization. 'It's been a while since I used that'.
He didn't necessarily have to deal with the gunmen but they stopped him from achieving anything.