Technically this may be true; But if you don't "keep" your students then there is no one there to teach. Then you have to analyze that maybe your "best way" to teach isn't really the best way to teach after all?
Yep, totally agree
If a dojo is having a major issue retaing students then the question of "Why aren't we retaining students" is a valid question to ask.
Nope, sorry, the question is "Why am I not teaching Aikido in a way that will attract and hold people without the interference of my personal wishes?"