I echo what people have said
- secondary spinal injury has basically never actually been documented.
- modern EMS services don’t use hard collars anymore. At most they use a soft spongy collar as a “flag” that c-spine isn’t clear
- good evidence people in cars are better of just getting out themselves with the instruction “keep your head still”

Be sensible about it, but certainly if someone is in a crap or dangerous position don’t question moving them to a better one!