There is a genetic component for sure; not everyone can become an elite athlete or lifter. However, with consistent training on a decent program (like you say), I would believe that nearly everyone who does not have a disability could get to a point where they can deadlift 2.5x ideal body weight, squat 2x, and bench 1.5x. And if you get here, you are physically strong.
I don't do specific training on those lifts, but I am approaching those targets. Hard work, eating right, and appropriate training.
To me, eating right means a good balance of carbs, fat, and protein. I target my ideal body weight in lbs x 1.5 as grams (about 260g of protein a day). I don't always get there, but I try to get to over 1/3 of that by early morning with some overnight oats with added protein powder, a protein shake post early morning workout, and something with protein for breakfast right before I start work). If I am building, I eat around 3k calories a day. If I am cutting, I try to stay around 2k.
Hard work means getting my heart going, sweating, and tracking and increasing my percentages. I enjoy crossfit style workouts. I track what my training max is, and lift an appropriate percent of that for given sets. Do varied lifts. Olympic lifts, power lifts, gymnastics, etc.
Appropriate training. Find a program and stick with it a while. A 5/3/1 program can be solid. I got a lot out of a cycle of juggernaut training on my back squat a while back. I went from 240 lbs to 305 lbs in a short window where I thought I had plateaued. I'm currently at 345 lbs. I'm in no rush to add the last 35 lbs to that to hit my 2x target, but I'll get there. If I wanted to get there faster, I'd be back on 5/3/1 or juggernaut again.