* Indonesia 204,847,000 (87.2%)
* Pakistan 178,097,000 (96.4%)
* India 172,245,158 (14.2%)
* Bangladesh 145,312,000 (90%)
* Nigeria 75,728,000 (47.9%)
If Indonesia suddenly became plagued by radical Islamic terrorism then it would be on the list too.
The seven countries targeted by the immigration ban have been either failed states or antagonistic to the US for the past 30 years, it is quite plain to say that it makes sense for Trump's companies -- and various other companies across a wide swath of industries -- to refrain from conducting business there. To say that other Muslim-majority countries aren't on the list due to conflict of interest is to deny this simple logic.
Plenty of other Muslim-majority countries have kept a lid on their populace by maintaining adequate internal security within their borders and providing valuable counter-terrorism intelligence to to the US, meanwhile the seven "countries of concern" have not.