@Daniele **********
And "they" also have condos all over Thailand with bloody-minded juristic offices which prevent you from selecting any internet provider other than the one approved vendor who may have very mediocre service. Worse, a single gigabit fibre line is often shared by dozens of units, resulting in very poor performance.
In my condo just getting internet turned on in my unit requires a 16k baht prepayment. To a company well-known for rather indifferent customer service and support.
We don't all live on a farm in Isaan.
But beyond that, it's a known fact that Thailand's internet connection to the west is limited in terms of bandwidth. Using a satellite service bypasses that significant bottleneck.