Starlink should always be a more expensive and slower technology just because of communication distance
That is not correct. The target of Starlink is satellite-to-satellite data routing in as close to a straight line as possible between point A and point B. Even adding the 500Km up and 500Km down, starting at several 1000Kms that’s less distance than going through the network of ground fiber cables.
The speed of light in optic fiber cables is also only 2/3 the speed of light in vacuum (aka: space).
Starlink’s end form is meant to get billions from charging intercontinental high frequency traders for a split second advantage.