Edit: Even better: the chance of being shot is way lower for an LEO than the average US citizen: Its .000122 for the average person vs. .000066 for an LEO.
(2017 numbers: 1/32510000039773=.000122 for the average vs. 1/80000053=.000066 for LEOs, gun deaths from here https://time.com/5476998/risk-of-guns-america/ and LEO deaths from the source above)
If you do the math, it does appear to exceed the number of incidences of being shot on the job.
Additionally the claim wasn’t, ‘exceed the number of incidences of being shot on the job’ it was, ‘majority of [deaths] are traffic accidents’
The most neutral reading of the presented data is that police are equally likely to be shot, have a moving-vehicle accident, and have a job related illness.
The remainder of job related hazards are extremely marginal in comparison to those three.
Guns, vehicles, and illness compose the near totality of incidents and those incidents are distributed nearly equally between the three hazards.