It heavily depends on the country. There are only a hand full of countries where iOS and Android almost have the same market share (US, UK, SE for example). In most countries this is not the case. Android share is still very dominant world wide (~80% vs ~20%).

Switching to another OS / ecosystem is not something done easily. When you are an Android user and everyone around you is why switch to iOS? There are plenty of good Android devices available for $400-$750. Also: in a lot of countries people just prefer a very big screen size.

So I think your comment is a little over the top. Yes it might attract some customers but I don't believe it will mean an exodus of Android users.