The last link (with the most recent data) shows well over 95% compliance in urban areas. The first link is over 90% nationwide. Surveys, no matter where they happen, have margins of error.

But regardless, are you seriously arguing that the difference between Vietnam and the US is...a few percent difference in self-reported mask compliance?

If the miracle cure of masking requires 100% compliance amongst 330 million people, your plan is doomed from the start.