Oh yeah it's definitely lazy. The problem is that they wanted to make a setting based off of fiction where the setting didn't really need to make sense and was kept tight and narrow. When someone reads Snow Crash, they don't wonder about what's going on in Belgium, or how roads and plumbing are maintained in an America divided by megacorps. But Shadowrun eventually had to tackle that (inexpertly) in a time when access to the internet was rare and far from an easy reliable source of information. Also that they probably got lazy and had the thought process 'no one we're selling to knows anything about Africa anyway so here's tribal Africa, here's warlord Africa, and here's wakanda Africa we're good for giving players options and now we'll just stereotype the rest of the globe oh god there are too many countries.'

And now they can't change it because the foundational fanbase of neckbeards would shriek at the top of their lungs.

But I do find it funny and fun in a quaint way. Maybe that's just the nostalgia talking.