I never ate sturgeon or swordfish, and I am not fully aware of the scientific facts.
R’ Soloveitchik, it seems, held like the Knesset haGedolah. Italian and Moroccan Jews have a clear mesorah to eat it.
Holding like Rav Soloveitchik hardly makes one a clown.
And, I think there are very few people out there who hold like one rav on all things. The Rav urged his talmidim to think for themselves, which is why I doubt any of his talmidim eat Kraft Cheese (certainly not Rabbi Avi Weiss, shlita).
The Rav believed in land for peace; I think this is a flawed argument halakhically. Yet, the Rov also had many unconventional chumros and frankly, some leniencies that I don’t chap. Rav Schachter himself says this.
I would be the first to say that a chutznik in Israel needs to keep 2 days of yom tov, yet the Rav said they should keep a day and a half. His talmidim put up an eruv in Teaneck, which is not kosher. And he also allowed dairy bread without a heker (he said that the dairy hechsher on the bag is a heker), which goes against the Gemara.
I don’t claim to slavishly follow any one authority. I follow a rational and reasonable reading of the halakha, in line with the intended meaning of Hazal and its codification in the Rambam and Shulchan Aruch.