It remains a clear halacha that we educate girls and boys differently. Ideally, we wouldn’t teach tanach either, but we must, and it is allowed bedieved, as per the rambam.
Rabbi yoshe ber accepted the words of the poskim as binding, as he was an Orthodox rabbi, and not a conservative clergyman. However this halacha is clear as day – far clearer than his chumros about krias hatorah; girls must not be taught gemara. They must be given different “opportunities” than boys, because they 1) will not be rabbis, even according to him, 2) don’t have a mitzvah to learn, 3) will be violating an issur if they learn gemara on their own and make divrei havai out of it
How is it עולה על הדעת that two sets of people with different obligations, responsibilities, should be taught the same way? It makes absolutely no sense.
Either he didn’t mean it seriously or he got caught in the avodaj zara of haskalah while writing that, ככפאו שד