Why does the Gemara give outlandish explanations for Mishnayos? Part 3

The gemara in Zevachim 15 makes a very startling statement about outlandish explanations for Mishnayos. The Gemara has a question about whether Holachah without walking is Pasul or not. The Gemara brought a proof from a Mishna, if blood fell from the Keli on the floor and it was gathered, it is Kosher (even though when it spills, some if it spreads out towards the Mizbeach, i.e. Holachah without walking). The Gemara answered that none of the blood spread towards the Mizbeach.The Gemara then asked, surely, it spreads in all directions! The Gemara gave 3 answers:

1. It fell on an incline.
2. It fell in a crevice.
3. The blood was very thick, and almost congealed. It did not spread at all.

Then the Gemara makes the following startling statement to reject these answers. The Gemara says, it is UNREASONABLE to say that the Tana taught about such unusual cases.

A while ago I mentioned the following explanation as to why the Gemara gives outlandish explanations for Mishnayos. 

If we take a look at laws of physics for example, Newton's first law. He points out that we can almost never see an application of it (an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force) because in the real world there are always forces acting on objects like friction, gravity, etc. You need to set up special laboratory conditions to see it in action. In other worlds, many laws of physics only apply in specific laboratory conditions, e.g. an אוקימתא. With this the article makes the following claim. The Mishnayos are written to tell us theoretical principles in Halacha. The אוקימתות are there to create the laboratory conditions where these principles can be applied. 

This Gemara would seem to contradict this answer. The Gemara rejects an אוקימתא because it is an unusual case. According to the above, that should make no difference, the point of the אוקימתא is simply to create the right conditions. Whether they are unusual or not should be completely irrelevant. We see from this Gemara that the assumption was that the אוקימתא is an attempt to actually explain the Mishna not just create laboratory conditions.

We see again that Daf Yomi is bad for your spiritual health. Most people who don't learn Daf Yomi will never learn Zevachim and never see this startling statement.

Here are the previous posts on this topic:

Why does the Gemara give outlandish explanations for Mishnayos?
Why does the Gemara give outlandish explanations for Mishnayos? Part 2
Why does the Gemara give outlandish explanations for Mishnayos? A possible explanation