Peace bro USResident
We need to caution at the same time not to undermine the reasoning that has been given to us in hadith … Such as “the salt water is pure therefore …” this is clearly an appeal to reason within hadith and cannot be sidelined.
In one of the lectures by Shaikh Zaid Shakir he mentioned there was scholar who refrained from eating fish from a river for a period of time because his student dumped some bread that was bought with by impure means. It was not because he thought of it as haram, but rather he put himself on a strict line of caution so as not to suffer the effects of such things in himself.
Islam encourages prudence over the self. A Muslim is one who looks for the haram and halal, but the Muttaqi is one ho protects himself from possible haram and avoids possible halal in case that it is not. It makes his life restricted which coincides with the hadith that states this life for the Mo’min is like a prison, but a paradise for the disbelievers.
When we ask scholars for fatawa regarding issues we do not ask wisely enough. Rather we should say what is or is not permissible and what is better or worse and may be ask them what they themselves do. Often traditional scholars will make things easy for others but be very strict on themselves.