Amen. Well stated and explained. I think a lot of folks, including some vocal coaches, just label any high (connected) notes they haven't learned to hit as "whistle tones." Then everyone thinks, "I need to l learn to do whistle tones so I can sing better. " Hopefully, your video will help people get back on track to meaningful development of their singing voices. (BTW, my compliments to your housekeeper. Impeccably clean walls you have there. 😜)