1)”The only reason they would become assur is because of “ha’yotzei min ha’tamei”, and the Chavos Daas 82:2 says this does not apply to separate bria.”
I respond with the statement of R’ Belsky as quoted earlier in the CR: “the parasite grows in the fish and becomes permitted as part of the fish” (not considered its own briah)
2)”I(t) seems that the scientists believe that anisakis cannot live without a host beyond this stage of development. While they may be wrong, I don’t think that possibility creates a safek d’Oraisa.”
I respond with:”Rav Vaye personally is concerned that the larva may be of a size significant in Halacha before being ingested by krill, as scientist’s definition of “microscopic” he considers too large.”
3)”Rav Dessler points out that the reason mentioned in the Gemara for the ruling of the Chachamim is not necessarily the only possible reason. The Chachamim gave the reason that was most obvious in their day”.
I have to research this, but even if accurate, does this affect psak halocho, especially to be meikil on a d’oraiso? And even when there is a simpler way of learning the gemoro? I doubt it.
4)”While I admit it may seem radical to render the entire sugya of Gemara and Rishonim irrelevant,”
I agree. It is radical. Your original point was that this is the more logical approach. B”H you now seem to realize that it’s radical.
Based on the timing of your post, I’m guessing you are not in the same time zone as I am.