After 14 years on type, B737, I proved the point. I let the F/O taxi onto a self manoeuvring stand, once I'd lined him up approximately 100m from the stop line. I then said put the centre line of the lead in line between his legs. Now go outside and look. The line was within the extremities of the twin nose wheels. Crossing the threshold, and in the flare, you are looking a long way down the runway and still quite a distance from touchdown. IMHO there is no way, in such a narrow flight deck, you can judge the offset distance between the centre of your seat and your left knee or centre pedestal. Forget the sim, I spent years of short sectors, therefore many demonstration, where F/O's tried your technique and landed with the left main wheels on the centreline, at best.
We'll have to agree to disagree, but I can't change the facts of 1000's of sectors.