I get that you are absolutely, cemented solidly, in your belief of this as you say it often enough. It's kind of like today...if one overlooks the differences, it can be said all Democrats are Republicans. While there were the major sects of Judaism in Jesus' time, there were also the minor ones that were lost in history. One these were the Nazareans--an offshoot of the Essenes, who were an opposition group of the Pharisees. In modern political terms, Jesus was more an Independent who went his own way. He was very much in favor of the teachings of Pharisees, but he also felt when it came to practice, they often missed the boat. What Jesus said about end times was more in line with Essene teaching than Pharisee teachings, especially the aspect of Essenes accusing Pharisees of not adhering to the full intent of the Law.
Where Jesus differed from the Essenes in his public life, is that that the Essenes were more ascetic and withdrew from society, whereas Jesus was definitely more social, and seemingly not as austere when it came to eating and drinking.
We just might both agree that Jesus was deeply influenced by both the Pharisees and the Essenes. You believe he chose a sect (Pharisees) whereas I believe he refused to become either, going his own way. I have been able to find little about the Nazarean sect, and nothing that can be considered a primary source at the time. They were thought to have been a group that did live apart, and some (both men and women) even took vows of lifelong chastity/virginity. I reflect on the idea that Mary and Joseph may have been part of this group (as Mary had taken such a vow, and seemingly Joseph had, too)--and this was the environment in which Jesus was raised. And, one of the Gospels did call him a Nazarean. Again, all just possibilities, but from all the information available I still consider Jesus an Independent as opposed to a member of a particular sect. (I take it we both agree he was not a Sadducee!

)