Would I want to force an employer to retain me? Ah, no.
Neither would I.
However, if I had been treated unfairly, in an unkind or high-handed fashion, and if there were reason to believe that legal recourse - or the threat thereof - might yield a positive outcome for me, then you can bet that I would strongly consider taking legal action, and would therefore seek the services of a lawyer.
Regards,
OTOH, if you have little or nothing to lose, make them pay. Even if it is some nuisance money to get you to go away. Too many good people are let go for horsecrap reasons whereas too many drones are retained because they are members of a favored group. The costs of political correctness need to be imposed, insofar as possible, upon those who practice it.