That’s a good suggestion. You’re about 5 years late… 
This has been part of the selection criteria for SotM for almost 5 years. (cf. 2024, 2023, 2022, 2021 was online, 2020).
Nairobi SotM’s answer was: “It’s a big city, with good flight connections. The courts said the government can’t ban gay groups any more”.
The OSMF Board spend months on this in late 2021, mostly led by my efforts. It was covered in 5 different board meetings/mid-month chats: #1, #2, #3, #4. Eventually the Board voted to adopt a policy 2½ years ago, in Oct 2021 to only hold SotM in places which are safe to marginalized groups, like LGBTQ people
Some other relevant history: In 2018, HOT’s annual conference (HOT Summit), took place in nearby Dar Es Salaam, and had the same issues _(here’s … someone … pointing it out]. In 2023, there were only 2 bids, on from Prizren, Kosovo, and Yaounde, Cameroon (some of the same organisers as Nairobi 2024). In the end the SotM WG decided to not have a global SotM, (relevant forum thread).
So it’s a good idea to consider these issues in location selection. 
That’s been the case for ~5 years. 
The OSMF Board had decided not to host SotM in countries unless they are safe from systematic or institutional discrimination for all attendees.