It will be different if they partner with P2P exchanges like LBC & Paxful.
The problem lies in trading volumes, which seem low. Within five months, about $300 million dollars have been traded.
Source --> https://www.binance.com/en/blog/421499824684900430/Should-You-Try-the-Binance-P2P-Platform-Read-What-Our-Users-Say-About-It
Adding more countries will not change much.
I see what you mean that by adding more countries on the list might not change much but in my opinion its nonetheless progress. Binance has been going strong and lately have worked on improving their platform even more, and so far we witness progress towards the lower hanging fruits before tackling the more complex issues like trading volume.
Overall, by adding more countries it also spreads awareness and helps with crypto adoptability which may not be Binance's main objective but its still a net positive for crypto