I agree about the needless misleading of expectations. Some, but not all, is - I suspect - well-meaning public sharing of ambitions based on most favourable ideal timelines - something very common across most Musk-led businesses. I usually read that stuff as a partial sharing of stream-of-consciousness ideas and targets before there's a fully formed plan of execution - where reality often imposes impediments!
In your Viet Nam scenario and similar cases I wonder if it is (partially) a result of the Starlink plan to use direct satellite to satellite LASER links to relay data in low earth orbit to a more remote existing ground station?
As in, if I recall correctly, SpaceX originally expected to be launching 'block 2' satellites with LASER links in mid 2021 but suffered internal hidden delays (that led to Musk's internal SpaceX existential warning in October 2021 and firing of some senior staff) so the first batch were only recently launched in early 2022.
Those LASER links being in place are likely a prerequisite for serving territories where SpaceX cannot obtain favourable permissions for ground stations.