no, he was not accepted because it was a bad academic fit. The recommender knew that. It may or may not have been a poor letter, but it makes no sense – except to those vested in prestige – to apply to the wrong grad program. (You can do a thesis in something that they don’t offer or have a faculty sponsor for.)
But, unlike grad programs – where even basic majors like English and Psych can be significantly different – law school education is much more similar, as required by the ABA. “Fit” is just no an issue at vocational schools.
With a good LSAT score, HLS, too.