I'm definitely with you in that diet culture does much more harm than good and the weight loss industry overcomplicates it in favor of wacky diets and subscriptions and such.

That being said, just because grifters overcomplicate something, doesn't mean it's actually not complicated - especially psychologically, which matters a lot when eating disorders, sensitivities, and difficulties acquiring and preparing quality food, all are in the mix. The psychological aspects are what "weight loss solutions" try to sidestep and I think it really sets people up for failure even if they see some short term loss early on.

Knowing about energy balance could be enough for some, but it's also definitely reasonable for someone to have further challenges and seek outside help for it. A good nutritionist, trainer, or even therapist can be invaluable for someone struggling to lose weight and keep it off.