The paper does mention that other estimates have reached both considerably higher and considerably lower totals (they quote one author who estimated 13,000/yr in the 1980s!). It's hard to get good numbers because the worst safety records appear to be among flag-of-convenience nations who also have the worst reporting and insurance practices, so a large portion of total fatalities (probably) come from the places with the highest uncertainties. But even among rich nations they did still find it a comparatively dangerous occupation: it's safer to be a Danish-flagged seafarer than most other flags, but still >10x the fatality rate compared to having a job on land in Denmark.
0.75 chance of dying is what you had on the Titanic!
Your number has no relation to reality at all.
https://www.newscientist.com/article/mg23731623-300-ghost-sh...
For American loggers, 90 deaths per 100,000 worker-years [2] making it the most dangerous job.
For American taxi drivers, ~18 deaths (of which 8 are murders) per 100,000 full-time-worker-years [2]. Making taxi driver the most murdered profession - and it was worse around 2000, when the rate was an eye-watering 23.7 murders.
As you say, policing isn't the most dangerous profession; the rate there is 11 deaths of which 3.5 are murders.
[1] https://academic.oup.com/occmed/article/64/4/259/1464740 [2] https://www.washingtonpost.com/news/wonk/wp/2015/01/28/chart...