I agree Learning to fight takes time and dedication.
And, while it would be nice if some "instructors" would stop teaching because they're not qualified to teach, it's also the responsibility of the student to do his or her homework on an instructor before enrolling in a class. It's not that hard. In fact, the internet makes it fairly easy to do. Larry Vickers; former member of Delta, considered by most to be an expert in firearms. Not hard to find him. Same goes for Kyle Defoor, Pat McNamara, Mike Pannone, Paul Howe, etc. Their resumes speak for themselves and there are plenty of AARs on their classes floating around on the internet. And it isn't just them. There are plenty of qualified shooting instructors on the national level and on the local level that run firearms programs for LEAs and Academies etc. If you're unsure about an instructor or class, do the research. If you're still unsure, don't take the class and find an instructor who has credentials, references and a class that works for you. In short, if you're the student, take the time and steps necessary to ensure you get the best training you possibly can for your money. That's your responsibility.