Zuo Dahai hesitated mainly because he needed something from Luo Chao.
No other choice, this is the rule of today's society. If you need something from someone, no matter how excessive their demands might be, as long as it doesn't cross your bottom line, many people will comply.
Some might even do things that go against their own values!
Of course, that's just one aspect of it. In reality, Luo Chao's request wasn't anything too demanding; it was simply asking Zuo Dahai to continue driving.
After all, as a full-time ride-hailing driver, driving is Zuo Dahai's responsibility and obligation.
Zuo Dahai was merely frustrated by Tang Tianyi's repeated nitpicking and her actions that seemed to find fault in his words, so in a fit of pique, he hit the brakes.
But now, with Zuo Dahai needing something from Luo Chao, and knowing that Luo Chao had an urgent matter—and aware that their destination was the Huahai City First People's Hospital—