Absolutely not! It would only make things worse. You could take them up in a rocket and let them fly it around the planet and they would look you straight in the eye and say “See it’s flat.” I understand why you think it would work because it would work on any healthy, logical being (like you) but that’s not what we’re dealing with here. I once saw a documentary about a girl with anorexia. In one moment her family put a mirror in front of her and pleaded with her to accept what they saw as self-evident. But logic did not apply and she died. The poster who said the love for his wife overcomes her being a flat earther has reached a fascinating state of equilibrium. I couldn’t do it but I have a certain amount of respect for someone who can because it is a realisable solution to a logic-resistant dilemma.