halacha theory - How studying Torah without Machlokot is possible?

The idea of Machloket-less study and transmission of the Oral Torah is very basic in Judaism.

I spot two approaches:

1. 
   

   That of Sanhedrin 68b - there were Machlokot and different approaches and schools, but they were all settled by the working Sanhedrin:

   
   

   
   

   "תניא, אמר רבי יוסי: מתחילה לא היו מרבין מחלוקת בישראל, אלא בית דין של שבעים ואחד יושבין בלשכת הגזית"

   
   
   

   "... Rabbi Yosei said: Initially, discord would not proliferate among Israel. Rather, the court of seventy-one judges would sit in the Chamber of Hewn Stone... "

   
   

   
   


2. 
   

   That there were no different approaches, just as Moses didn't have them: Rashi (Sotah 47a see also Temurah 16a):

   
   

   
   

   "עד ימיהן לא היה מחלוקת בחכמי ישראל כולן היו אומרים דברים כנתינתן למשה"

   
   

   
   

While the first sound reasonable and feasible, the second sounds improbable and illogical: besides simple reciting mantras, discussing just anything leads to discords as a result of:

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  Differences in perception of the surrounding world - for example, time of sunrise, colors of stains, animal species or estimations of physical states (illness etc)

  
  


• 
  

  Finding new interpretations of the text

  
  


• 
  

  Different hierarchy of values (what overrides what)

  
  
  

Moreover, we can clearly see that Moses himself perceived the obligating (him) Halochos differently than what G-d told him, as in Breaking the Luchos, adding a day before Matan Torah, hitting the Rock and more.

I'm looking for a more comprehensive explanation of the approach that for over a thousand years studying of the Torah was Machloket-less.