I’m just curious from what source you pick your information. And did you ever had a descent physique, low body fat %? Counting calories could be very beneficial for some people, it’s only a tool - the question is would you manage to gain something useful from it or not, does it help you to achieve your goals? For me, for example, I have never counted calories even when I competed - and I have achieve pretty high results.
I’m telling your as an fitness/martial arts coach, two time national silver medalist in bodybuilding, one time in mma, plus I had national/euro champions students.
All what I wrote is out there, it's a common knowledge and not a secret )) I am not a high performance athlete now, I'm much older than you. But I have good physique and decent lean muscle mass. But I don't even care to measure it these days. This is because I know how to regulate it quickly when/if needed. That's why I often feel sorry for ordinary middle-aged obese guys who are sweating in the gym or running in our park trying to jog away from excess kilograms. Sport is great, but their problem lies elsewhere.
I stopped measuring my indexes long ago. My only measuring tool now is my jeans size, it's waist 30in fyi, just like it was many a year ago, when I was a teenager. I do weights 3 times a week and play TT about 6-9 hours a week. In my view it's enough for a 68 years old fart. And of course no sugar, no bread, no processed food, no veg oil, etc etc. Cook for yourself and avoid snacks. That's basics that work for me.
My club partners sometimes say to me "You're so lucky with your genes and your metabolism". Each time I want to reply "It's not about the genes mate"*, but I just don't want to open this huge box of worms and only reply "Yeah, thanks". These guys were lied to about nutrition all their lives including this "calorie in calorie out" BS, and it will take years to change it, sadly. In the meantime over half of adult Americans are metabolically unhealthy, 73% are overweight and over 40% are obese. UK is catching up. It's a sad, sad picture.
Professional athletes, high performance sports, bodybuilding or kicking each other with both feet for a living is a completely different ballgame, you may measure your calories and whatnot for whatever performance reasons you want, I know nothing about it and not interested in that. I'm talking about ordinary guys like me who do sports as a hobby and want to be fit and healthy, which is vast majority of this forum.
*OK, I feel I need a disclaimer here)) There IS a small % of individuals who are genetically predisposed to be overweight, their adipose cells have increased ability to store fat. These people are healthy, despite being oversized and any attempts to shed weight long term are mostly futile, because what they perceive as overweight is indeed their optimal weight, but it's a very small minority.