Joseph,
You wrote: “He quotes the Rambam, who he describes as “the father of philosophy” in our religion, in Hilchos Yesodei HaTorah, stating that a person may not learn philosophy until after he has “filled his stomach” with Shas and Poskim, which are the things, and only the things, that bring us Olam Habah.”
The Rambam says that about learning Kabalah (i.e. Maaseh Merkava), not philosophy.
???? ???? ???? ???? ????? ????? ??? ?? ?????? ????? ??? ???? ???? ???? ??? ???? ????? ?????? ?????? ??? ???? ????? ???”? ?????? ??? ??? ??? ???? ???? ????? ???? ???? ????? ??? ???? ???? ????? ???? ??? ?????? ????? ???? ???”? ?????? ?? ??????? ??? ??????? ???? ?? ??? ???? ???? ??? ????? ?????? ?????? ????? ???? ??? ?????? ????? ??? ??? ????? ??? ????? ??? ????? ????? ??? ??? ????? ??? ???? ??? ?? ??? ???? ?? ???. (Yesodei Hatorah 4:13)