Africa is a big continent and that is a big generalization.

I don't see what point you are trying to make by discounting dangers that are studied and very real.

If your life depended on knowing about these things, won't you be surprised when reality hits home.

Its common sense for a rational person to not discount downsides that are easily verifiable.

For your further reading and there's a lot more than just these:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7558156/

https://www.who.int/news-room/fact-sheets/detail/onchocercia...

https://www.who.int/news-room/fact-sheets/detail/trypanosomi...

https://wwwnc.cdc.gov/travel/yellowbook/2020/travel-related-...