Nearly 5 million people have died from COVID worldwide.
Within that, is 140,000 in the UK.
Deaths from vaccines in the UK?
https://blog.ons.gov.uk/2021/10/04/how-many-people-have-died-as-a-result-of-a-covid-19-vaccine/
Approx 45m people have been vaccinated in UK. And only 9 of those have died, with vaccine as a contribution to the death.
So tell me again, which one is rarer? With the data above, chances are dying from the vaccine is significantly and dramatically lower than from COVID.
As for that foetal stuff you conveniently quoted, they also said:
With HEK293 being the reference they use for that initial test in 1973. Something they've used for decades, so it's trusted and reliable according to the same scientist you referred to.