I think the answer varies, which is also at the heart of where some of the challenge promoting and growing comes from. It is a passion, hobby, past-time, lifestyle, investment, stepping stone, development ladder… Take your pick!
I see parents who think their kids will be the next Mario Andretti and are pursuing accordingly. These are the same type parents you see in youth basketball, football, or baseball that believe they have a kid with professional sports future.
I see people who love motorsport and this is how they enjoy it with family. There is no expectation beyond enjoying some tinkering and a sensation of speed/power. These folks are cut out of the same cloth as folks that like to hang out and ride motorcycles, do some off-roading, etc.
I see guys that have been professional drivers that do it for fun and to satisfy the competitive juices. They either got too old, made family choices, progressed to the limit professionally. They all seem to universally enjoy the drive just for the drive and the chance to dice with others on the track.
I see folks that show up and drive around for practice, but never come race. They just like the sensation of speed when you are 1" off the pavement braking as late as possible and being pushed around in the seat.
I also see people that never raced, never envision racing beyond karts, but love the competition of it all. They come out to beat a close friend, even if its for 5th, and go home happy about the day.
My family is a strange mix of it. We enjoy motorsport in my house, but my son is also passionate that he wants to be in motorsport. We are realistic that the odds are long and the pockets are most definitely not deep enough. We hope he learns some skills, makes some contacts, and finds the path into endurance racing that he desperately wants. We also have a family history in motorsport, albeit none in karting. My mom raced, my dad raced, both doing off-road and drag racing. I did not get that opportunity, but it was in the blood. My son started driving RC off road and oval stuff at age 5 through COVID when it all closed down. It was all we could afford to race! As he got older and my employment and wages progressed, the potential for karting became real. So now we are 18 month in and about to start our second full year karting. We will carry through 2 more years for sure, beyond HS graduation is an unknown.