Backpacking in the 70s moved away from boots in the traditional sense, almost entirely. Particularly if you don't walk much, the fact you have something light on your feet is a huge game changer. Africa isn't the moon, I assume when people go orienteering, backpaking, marathoning, etc... They don't wear colonial era leather footwear. I love leather, but since that change in the 70s, all my gear has been nearer running shoes, than boots. I had a severe ankle and knee injury in the 90s, and ankle support would be nice, but I still wear the same shoes when hiking.
The break I remember in the 70s was an article by a member of the crews that maintained the Apalachian trail system. They carried in huge packs of construction goods, and they were the ones who pioneered the use of shoes, even though back then there was no category of hiking shoes, they were using running shoes, and they also had very pliant soles. Nothing justified carrying pounds of boot with every step. Of course there could be local conditions that require a different approach, one assumes. Ask you outfitters.
Nothing will ruin a trip faster than a leather boot you haven't really broken in with the mileage that one expects on the trip. Not just a quick spin in the back yard. Find out what the triathletes are wearing as socks. Usually a very low ankle thing, but the technology is usually pretty nice for general wear, though my stuff is pretty old at this point. Make sure you have moleskin, and glide anti-chafe stick in your stuff, or whatever the modern versions are.
Here is a pic of Alex Honnold (north face sponsored). He has his waist belt done up, so the pack might weigh 20-40,#. Look at the footwear for Angola. The guy he is with looks like he has some serious dive weights on his feet.
Here is a pic of Gramma Gatewood, hiking the Appalachian trail in what look like Keds, or PF flyers. Back in 1955 she had no special gear. Light is right unless there is something specific to fear.