This is partially true. Connectivity is better than most people imagine, even in places like Madagascar (was something like the fifth poorest country recently?). We had 4G in the middle of nowhere and yes, it's cheap for Westerners.

However just because 3/4G exists doesn't mean people can afford it. In Madagascar for example, the minimum topup is 100 ARY or about 3 cents. Most people can't afford significant amounts of data, especially not when an autoplay video can bankrupt you.

That's the big problem with the argument that starlink is helping developing countries. These countries would be much better off with better rural cellular coverage first, not expensive satellite networking. Unless spacex will subsidise developing nations, who's paying for it?