Well, I guess organizers have to stop organising races, or at least to do in on a flat local lap for everything to be safe then?It's clear that the threshold from the organizers for what is safe is too low
You simply can not eliminate risks in bike racing and it's pretty convenient for riders to always cite safety.*
*It is possible that conditions today were really unsafe. But (very) wet road while unsafe condition should NOT be condition to stop a race.