No argument from me about this, however, as debated here before, the majority of the numbers are cheap Chinese zero baht package holiday tourists, with profits being repatriated back to China.
It will be interesting so see over the next few years where western tourists chose to holiday, and I mean tourists, not sex tourists.
The buses look old and are not nice coach buses, thus, most individual tourists chose a vehicle, usually a private taxi. Everyday, thousands of private vehicles, yes, thousands, convey individual tourists, being the sole passenger, between Bangkok - Pattaya - Bangkok, to the detriment of the environment, roads, traffic, cost etc etc. This has not changed for decades.
When arriving in Vietnam, I take a metered taxi from the airport into the city.