Of course this is unlikely to happen because the companies running these conferences are mostly based in the EU/USA/UK and would not bother with the inconvenience.
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.
When I was an analyst we really didn't much care for when a company would put on an event at some desert resort a lot of the time (around Phoenix was generally OK--if in winter). Even with them picking up a lot of expenses, it still cost us money out of pocket and it invariably took a good additional day out of out schedules relative to just having it in San Francisco.
There are lots of other countries that balance both cost and convenience (ie: Turkey, UAE, Malaysia, Qatar)