I must say that you are committing pure blasphemy in the eyes of many in this world!
Galileo and Martin Luther were heretics at one point. I'm in okay company!
.45 has its uses: it's necessary to compete in certain competitions, it makes a decent hardcast medium game bullet at archery ranges, and, if you live in New Jersey, it throws the biggest non-expanding ball you can fit in a concealable semi-auto. Due to the bullet weight, it can also be loaded quite soft for target shooting. It's a fun load to shoot and certainly worth owning.
However, it's not practically advantageous as a martial/defensive round/general purpose round.
Let's say the average guy is 180 pounds. That's 1,260,000 grains. A 230gr bullet is 0.018% of that person's body mass, a whopping 0.009% improvement over a 115gr 9mm.
.45 is only 0.1" wider in each dimension of frontal area than 9mm, and, expanded, it is still only about .1 inches wider in all dimensions. Say a guy is 18 inches across at the shoulders. A .45 is 2.5% of his frontal area, and a 9mm is 1.97% of his frontal area. That's a 0.53% "advantage."
.45 generates more "muzzle energy" (50-100 ft/lbs depending on the rounds compared), but that figure is practically worthless until you hit about 1000 ft-lbs and start actually creating hydrostatic shock. A pelvis or sternum is not going to laugh off 350 ft/lbs of 9mm, nor will it disintegrate if hit by 410 ft/lbs of .45.
Now, a .45 will chip away at a cinderblock faster, but people and animals are not cinderblocks. Pistol bullets work by (1) making holes that lead to rapid blood pressure loss, (2) compromising bone structures, (3) impacting and severing electrical systems, and/or (4) by inducing a psychological stop. 9mm on up (especially 124 and 147gr loads) will do all of those things with lower recoil and more rounds in the magazine.
Given the de minimis advantages of a modern bonded JHP .45 compared to a modern bonded JHP 9mm in relative size and weight, the negligible advantage in energy, the loss of capacity, the increased recoil, and the increased price of practice, the .45 is practically obsolete.
So are Camaros and rigid frame mountain bikes. Obsolete things can be fun, and if you have arbitrary limitations (class designations in competition, very tiny scoring rings in bullseye, or magazine capacity/bullet design restrictions), obsolete things might be the best options in those contexts.
1911s are still very viable handguns (especially for concealment, given their width), and there is endless technical support available for them. In 9mm, you get increased capacity, decreased weight, reduced recoil, and all of the other benefits of a 1911.