It's not so much ridiculous as "There are ways to do it safely. History strongly suggests that the default should be to assume it's unsafe, so treat it with heightened scrutiny."

There may be some specific ways in which Lamarckian genetics is correct, but given that trusting too much in it has already resulted in one crippling famine, it's fair to hit claims founded on it with a larger skepticism bat than theories based on Mendelian inheritance.