<<such a thing can work in a case such as lulav, but in a case where an action creates a given result, i don’t know if that result can be overridden. >>
I think that we do say “yesh lachazal koach leakor davar min hatorah b’Kum ve’assei” (The rabbis have the power to uproot a law in the Torah by saying “go and do something” (actively violate the Torah)) (Yevamos 89a) but I would assume that this only applies in a very small amount of cases, under very specific circumstances.
Well, if we say that the problem is whether or not a man who marries/has relations with her is considered and adulterer, this would be exactly the case, because even though the Torah considers the woman to be a married woman and it would be forbidden for another man to marry her, the Rabbis are saying, “Go ahead, marry her, even if she’s not divorced from the first man yet.”
not only that but if me gave the rabbis permission to change the laws like that then who is to say that… im going out on a limb and dont actually believe this btw… christianity isnt right since all they did was change the laws a bit… ok a lot but you get my point… if the rabbis can override things in the torah as some have said in cases like lulav and marriage kinda, then what about every other aspect???
That’s not changing the law. They’re not saying “pig is kosher” or anything like that. It’s telling us *not* to do something for social benefits that the Torah would otherwise permit. Like polygamy is permitted by the Torah, but we no longer do it. That’s properly exercising the authority that the Torah gave them, not creating a new religion.
There are circumstances where we do say “yesh lachazal koach leakor davar min hatorah b’kum ve’assei” - that the rabbis have the power to tell a person to actively violate a torah commandment (not just restict something that the torah permits). If this is the case, then what stops them from permitting everything that the Torah prohibits?
Your entire question revolves around the assumption that Chazal (the Rabbis, the Sanhedrin, The Anshei Knesses HaG’dolah - whoever) would abuse their authority. To get to be Chazal, you have to be pretty learned and also pretty righteous. We don’t see Chazal abusing their authority. For example, Chazal had the legal authority to make personal property hefker (ownerless). Yet they didn’t go around commandeering people’s property.