You are saying the Stomach is a universal symbol for greed, and there saxib, is what the Hadith is conveying with some caveat in that a Muslim needs to control that greed and not follow his stomach like some non believer would...
You are somehow providing the answers but you willfully blind yourself to what you are saying. Also, sometimes people mention part of an organ in reference to the total organ. It is all linguistics.
If you want to argue over this all day, then my objective is complete and your claim that this Hadith was teaching science by saying people have seven intestines is proven to be false.
The same hadith you quote says someone has ONE INTESTINE ... so there is contrast of images between two people, one with an intestine(singular) and the other with seven...
Come up with something else, this Hadith is settled.
War yaa ilahay ya qaana. The hadith does not mention stomachs. It is talking about intestines. Where did you get stomach from? You've introduced two words to the hadith which are not in it - greed and stomach.
You keep talking about the number seven. That is only one part of the equation. The other part is that it falsely asserts that Muslims have one intestine. This disproves that it is metaphorical because if it was really about how greedy non-Muslims are, it would not undercount the number of intestines Muslims have. It would have said that Muslims have two intestines which is the actual number of intestines that we all have. What purpose is served by undercounting the number that Muslims have?
Furthermore, there's no evidence non-Muslims are greedier than Muslims. Arab dictatorships are more corrupt and prone to steal the wealth of their citizens than western countries which are democratic and accountable to the electorate. A lot of Muslim dictators are billionaires. Few Western leaders are. So even from a historical vantage, the hadith makes no sense.
But I agree, let's not harp on this one hadith. Let me ask you a question: Bukhari says the the Messenger of Allah asked his companions if they know where the sun goes when it sets. They said no. He replied that it goes to bow at the feet of Allah's throne. Do you believe the sun sets and goes to Allah's throne?
Another question: do you think Allah looks like a human? One hadith says that Allah created Adam in his image. This contradicts at least twenty Quranic passages which say Allah does not look like his creation. Another hadith says that one should not punch people in the face because Allah made them in his image which makes it clear it is talking about a physical resemblance for otherwise the prohibition against hitting the face would make no sense.
Also, why do the hadiths in the link I provided contradict themselves on how old the prophet was when he died? Two different ages are given by Bukhari and Muslim. They also contradict themselves on how long he lived in Mecca for. This is what happens when you put the word of Prophet Bukhari over the word of Allah. May Allah save us from that fitna.