Logistically, it's a _lot_ harder for a person/team to organise a conference in a location they don't live in. There's logistics of venue, payments to vendors if you're organising food/travel/hotels, you might have volunteers for registration, information, etc. and it's easiest to find those in your local community. And finances across borders are anothe huge wrinkle.
It's not impossible, but certainly adds significant complexity.
Logistically, it's a _lot_ harder for a person/team to organise a conference in a location they don't live in. There's logistics of venue, payments to vendors if you're organising food/travel/hotels, you might have volunteers for registration, information, etc. and it's easiest to find those in your local community. And finances across borders are anothe huge wrinkle.
It's not impossible, but certainly adds significant complexity.