Honorable arch-sorcerer, emeritus professor and headmaster at the advanced academy of magic, Hugo Warts, may his glory increase, of the Order of the Phoenix, author of Two Cars and a Flying Broom, etc. etc., His Reverence Michael Abraham, may he live and be well—
Since I was unable to open an independent question, I will fulfill the verse that says, “Ride forth prosperously on account of the matter…”
I heard in one of the lectures about “halakhic autonomy”
that you mentioned the Maharal’s approach, regarding independent halakhic ruling being preferable to studying from books of Jewish law, even where there is concern about error.
I’d be glad if you could point me to the source for this.
And I will repeat the blessing: may Dumbledore yet live,
and may Snape also be remembered for good.

To the honorable Professor McGonagall, may she live long, I hereby dare direct Your Honor to Netiv HaTorah, chapter 15, where our crown, glory, teacher, and rabbi the Maharal elaborates on this matter; look there carefully. And I am confident that the words will be as clear to her as a cat and a cauldron, and like the other remedies in our hands and those not in our hands.
It seems to me that the Maharal was among the thinkers behind the establishment of your school and the guide of your path, when he created a golem out of nothing, and the explicit Name was fixed in its mouth upon the broom in the flight of Quidditch. And may it be God’s will that he-who-must-not-be-named be crushed under her feet, like the work of sapphire brickwork and like the essence of the heavens in purity.
I remain, crawling in awe after the kiss of the soles of her holy and pure feet, vanishing and dissolving in the forbidden forest from dread of her exaltedness.

But does the Rabbi actually follow them?

No

It seems to me that this is good advice socially—not to mix one joy with another “joy.” And perhaps there is also a psychological element here: not to depress the pregnant woman in a way that could affect the baby’s development (put her under stress and the like).