Lol dude... You're kidding yourself. Maybe it'll be more apparent on your journey to 300?
Muscle growth and strength comes down to genetic ability, whether you believe it or not is irrelevant because it is scientific fact. Now, that doesn't mean poor genetics will completely cancel out hard work, but only a fraction of the population can achieve something like an Olympia physique.
Muscles don't grow unless the satellite cells surrounding your muscle fibers donate their nuclei to your muscles so they can produce more genetic material to signal the cells to grow. Genetically, there are excellent responders, medium responders and poor responders. Excellent responders have more satellite cells that surround their muscle fibers, as well as a remarkable ability to expand their satellite cell pool via training.
Further, genetically, some individuals have low testosterone levels that are not high enough to provide benefit to them in bodybuilding or strength training... Meanwhile, some individuals have test levels out of the reference range and are completely natural.
Myostatin, some of us have a genetic advantage to build and keep more muscle and retain less fat because we have less myostatin... Some have a myostatin deficiency that allows them to be bigger, stronger and faster by never having trained at all. While others have a lot of myostatin that will always put them at a disadvantage.
I could go on but I'll stop for fear of this falling on deaf ears. All of this is easily researched though, I encourage you to look further into it.