You cannot say a whole field is fake because of a single experiments on students of that field. Neither can you by looking at people using their diploma but lacking the real expertise. I know chemistry PhDs I would never let run even the simplest experiment... They still boast on social media that they are experts, same with people selling wine and lying to clients to make them believe the wine is good or taste like…
But its such a profound failure, it warrants skepticism of the field. Or at least of schools that purport to teach a skill, then fail at that entirely.
To the degree that "skepticism" means thinking hard and applying work to discern differences, it would be warranted. To the degree that it's interpreted as general doubtfulness without further effort or thought, that's actually the opposite of true skepticism.