There are 20 natural amino acids that make up the protein in our bodies. Out of these, 10 are nonessential because our bodies can make them. 2 are newly found in a few proteins and naturally occuring. 8 out of the 20 are essential and need to come from the food we eat.When you eat proteins your digestive system breaks them down into amino acids. Therefor none of the anemone proteins would ever even make it to your blood stream let alone across the BLB.
In nature, there nearly 300 amino acids. We do not need these, but eating proteins that contain these will still lead to them being broken down into amino acids, even though they are not essential. This includes proteins from animals that are very different from us biologically, including sea anemones.
In the small intestine, amino acids are absorbed into the bloodstream and get transported throughout the body. The amino acids broken down from the sea anemone repair proteins do make it to the bloodstream and can cross the BLB.
I think of it more as a discussion or a debate, but call it what you want. It is not completely over. It has only just begun.The argument is completely over at this point.