As someone else that doesn’t go to a gym, it is a combination of: they enjoy working out or do so for another reason, they don’t have the space for gym equipment at home, they can’t afford to buy and maintain the gym equipment they want to use, the gym they attend offers classes or personal training guidance, they enjoy the atmosphere and encouragement of working out with other like-minded individuals.
It isn’t something magical, it may just not be for you.
Yeah, the problem isn’t that the big trucks exist. There is a place for them, always will be. But they shouldn’t be a commuter vehicle, the majority of owners never use them for their intended purpose, and even those that do need a truck rarely need one of the size they get.