Obviously there is some latent risk in choosing a career anywhere, that the demand disappears. There can’t literally be zero risk of structural demand changes.
You say no plausible path to automating - I beg to differ.
It would get officers out of harms way.
Not imminent but not zero risk either.
Unless it's a criminal record holding you back, I really don't think this is the case. Since 2012, I know lots of people that changed careers.
The first step to solving the problem is acknowledging the problem, not throwing earnest observations of dysfunction into the, "I know a short guy who gets lots of sex, height doesn't matter," bin.