A good lawyer would soon destroy that airline management technical decision to castigate you for a command decision based upon your considerable experience as a captain.
Dunno about that. An airline has remarkable and unusual powers to ditch pilots. They maintain they need full and complete trust in your Professional judgement which is a much higher criterion than, say, a shopworker's ability to work a till and if they claim they've "lost faith in your ability to operate" it will be very very difficult to overcome that objection claiming unfair dismissal, because if the airline does take that stance it may well not be deemed unfair.