I think it is the problem of supply and demand because EU and even more US* are making vaccines way more expensive.
* EU is buying vaccines together to not compete for price between states but the price is probably way higher than African countries can pay. Imagine the whole world teamed up together and vulnerable people would be vaccinated at the same time before young healthy people as it is done now in EU.
Boosters and supply chain issues have rather upended that plan, though.
But I also just don’t want to get sick at all because getting sick sucks.
That’s the same reason I’ve been getting yearly flu shots every year since college. Before COVID I never even really considered the personal risk of long-term side effects or death from flu (although I’m sure there’s some measurable risk) or the fact that flu kills tons of people every year. I just hate getting sick and from the evidence I’ve seen the flu vaccine is very safe and usually fairly effective at preventing the flu. Same goes for the COVID shots. I’d take common cold vaccines if they were similarly safe and effective and readily available.
In certain cases it may be that getting a mild infection does help prevent later more serious infections, but AFAIK those cases are generally getting infected as an infant or child. I’m not aware of evidence showing that current widespread vaccines for adults have this effect of trading mild illness now for more serious illness later.
But it's not universally true, varies for different viruses, and also isn't fully understood whether it's the case for covid. So far seems like a safer and less miserable opinion to get vaccinated rather than get sick with covid.
Your only "sick" because you didn't pro-actively teach your immune system to handle that flu.
This is precisely what vaccines do, without the "falling sick" part first.
Not to mention that climate in central Europe effectively stops virus from May to October so it will be way more efficient to vaccinate people in August and September.