Most simply don't have the time, it not a matter of the equipment or not knowing how to do it.
If shooting was my only hobby and I just punched a clock for someone 5 days a week, sure. But then I would be doing it to save money because I couldn't afford it otherwise.
Between my own businesses, full time job, other hobbies and family, it doesn't make sense to reload, my time is better spent making money, buying ammo and shooting when I have time. If I were to reload, I would have way less time to shoot.
With how expensive the cost of living and goods are becoming, it doesn't make sense to use free time to reload when I can be making money, buy ammo, shoot and still be further ahead than if I were reloading.