Nailing public figures who lie for personal gain to the cross serves a very important function by dissuading other public figures from doing the same. Otherwise, the math suggests that every public figure should be lying for personal gain since they can just get away with it. At least in the US, there are far too many politicians who think they can get away with lying through their teeth to the public.
However, it looks like Fauci has outlived his usefulness to the ruling class, and they are currently in the process of throwing him under the bus.