There you go again... that impressive psychic ability that allows you to perceive more than the average bear.
impressive psychic ability has nothing to do with it.
Could it be that you just are one of the LUCKY ones that got good instructors that didnt screw you?
No, I don't believe in the concept of luck, at least as it relates to the selection of a martial arts teacher. Instead, I believe in choice, because that concept allows me to take responsibility for my life. Luck, blaming others for one's situation etc. are rationalizations or attitudes which reinforce the idea that we are not in control of our own lives, that someone or something else is the cause of our woes.
For example, if I remember your situation correctly, you were with your instructor for 18 years, teaching classes, and he promised you that one day he would give you the school. He then reneged on his promise, which made you angry. If I were in your situation, or rather, when I was in your situation, I think that 18 years in the same school is too long, that anything past 3rd or 4th Dan is too long, and I would have opened up my own school on my own, which you eventually did anyway. If in the future, your instructor did end up giving you his school, terrific, but if he didn't then no harm no foul because you had your own school, which you built yourself.
An analogy would be your parents promise to give you their house. you move out of your parent's house and buy your own house, then you make that yours. If your parents still end up giving you their house (which may or may not be better than the house you bought on your own), great. If they don't, then it doesn't matter because you already have your own house. And if they change their mind and give their house to your sister instead, well, it's their money and they can do whatever they want with it.
Or you can live in your parent's house, living on the promise that they will give your their house. At some point, they sell the house and/or give their money to your younger sister, at which point, you have no house and you get very angry, at your parents and sister.
Which is the healthier perspective?