Just my 0.02, but I think the core issue, and the core solution is that karting lacks a culture and lifestyle ecosystem around it.
I agree with almost all of Alan’s points. Personally, developing a culture around an activity is an attainable, organic, and (once established) much more cemented thing than having a documentary or the FIA spin their narrative.
If I look at the differences between karting and other adjacent motorsports the biggest thing I see lacking in karting is a coherent culture, lifestyle, or community.
Efforts like @XanderClements help, and clearly bring viewers to the sport. But if you have a group that is always pulling in different directions, or has their only cohesive commonality being that they compete against each other it’s hard to grow something attractive to others based solely on that.
It’s a shame, because I meet a ton of interesting people at the kart track. Maybe it’s just me, but I don’t see a lot of extension of participants and their life choices, spending habits, or time allocation choices to extend with regard to karting beyond going to the track.
I look at other sports, that started off with very small participant pools (historically) that grew to be very popular. Motocross is the best example of what I think karting could be in terms of popularity, community organization, and most critically, lifestyle and culture. I’m not saying I want karters to wear Monster hats and have tattoos and drive lifted trucks, but whatever our culture evolves to be, if we could even be a fraction of the development moto has had since the 80s it would be amazing.
Maybe I’m just too close to karting to not see it. And admittedly I’m not in every region. I’m not at every race. But since I started to now…I really haven’t seen a change in terms of culture. In some ways I’ve actually seen a massive regression. I (personally) don’t feel like I have a clearer idea of why I find karting appealing aside from disparate components.