The key words in this example are hypothesis and principle. What counts as an hypothesis? Do we allow ideas that (a) permit more paper publications, and hence career advancement, because they are based on equations that we already know, or (b) consider hypotheses that follow from the principle?
Now what counts as a principle? Do we (a) demand the data be fitted to a mathematical curve as quickly as possible, lack of explanations notwithstanding, or (b) consider carefully which established fundamental concepts are inviolable, and which are not?
The energy distribution itself is neither an hypothesis, nor a principle, but that which must be explained. Lest we forget.