While I don’t disagree that it can be valuable to say that there’s something wrong with a theory, it should be noted that at least for factual matters, if you can’t provide an alternative explanation then your criticism isn’t actually that strong. The probability of a hypothesis being the true explanation for an observation is the fraction its probability makes up of the total probability of that observation (summing over all competing hypothesis, weighed by their respective likelihoods). If you can’t move in with another hypothesis to steal some probability clay from the first hypothesis (by providing likelihood values that better predict the observations), that first hypothesis is not going to take a hit.
While I don’t disagree that it can be valuable to say that there’s something wrong with a theory, it should be noted that at least for factual matters, if you can’t provide an alternative explanation then your criticism isn’t actually that strong. The probability of a hypothesis being the true explanation for an observation is the fraction its probability makes up of the total probability of that observation (summing over all competing hypothesis, weighed by their respective likelihoods). If you can’t move in with another hypothesis to steal some probability clay from the first hypothesis (by providing likelihood values that better predict the observations), that first hypothesis is not going to take a hit.