Not sure what bubble you live in, but that is incorrect. Maybe in California it's 80/20. Every single statistic globally is nearly 80/20% for android. There is a few rich markets and they may be 80/20 for Apple, but realistically Android wins every single time, no matter what market you look at.

China/India are like 30-40% of the world, and they are both under 20% usage.

Europe - 60/40% split for android

US/Canada - 40/60% split for iPhone

Even some of the higher countries are only 70/30% for iPhone.

Ignoring that is fine if your target is rich North Americans.

But you are still chopping off X% of customers.