Here are some of my unpopular opinions:

Diet:

• Total calories matter far more than macros for bulking and cutting
• Many say they are cutting when they are just fat and need to lose weight
• If you don't monitor calories you end up using some substitute like portion size or excluding "bad" foods to control calories
• Protein at double RDA is probably fine, maybe 0.6-0.8g/lbs, but most likely it doesn't matter except it can help with satiety
• Most of what we "know" is repeated from internet marketers and publications that derive profit from sales of protein powder
• Where you set your carbs and fat doesn't matter much beyond diet adherence, barring extremes
• There is no magic set of macros or magic "eating window"
• You can't market a diet that reads "control your calories and include some protein source with each meal"
• Supplements are a waste of money, and none have proven benefit including vitamins, except maybe creatine
• Consistency with a mediocre diet gets better results than a great plan without adherence
• Higher exercise volume allows you to maintain your bodyweight with a higher calorie intake and for many increases enjoyment of life

Exercise:

• Aerobic exercise has proven benefits, and while no one needs to run marathons, some LISS is healthy
• Powerlifting, bodybuilding, gymnastics and Crossfit are sports and not required to be healthy or look good
• Whole body lifting, 1-2 sets of 8-10 exercises performed 2-3 times per week is great for beginners and those who don't have much interest in exercise
• Non-exercise physical activity is important, like walking
• Choice of exercises should take into account goals and risks vs. benefits
• No one needs to squat, deadlift, press or bench to be fit, although they can be good exercises for some people some of the time
• Beginner, Intermediate, Advanced outside of powerlifting should not be based on how much weight you can lift

General:

• While internet bulletin boards aren't the place to seek medical advice, because we don't allow asking for help with injuries, we often don't see the consequences of what we recommend
• People come to fitness at all different times in their lives and all different physical conditions, and powerlifting programs aren't the answer for many of them