No, that's a non sequitur, you're making a comparison between alternative situations and drawing the same conclusion.
Standing vertically looking at one's phone (stupidly unaware) whilst in the middle of a parking lot,
Or,
Half bent over picking up a 10 baht coin
Are infinitely more visible, and NOT in anyway the same as laying flat, passed out on the pavement.
If the drivers had been driving an SUV or even some crossovers, there's absolutely no way they would have seen an adult body, or even a toddler standing.
That's a testimony to the inherent danger of some automobiles in terms of blind spots, and to some extent an irrational trust of the driver that there's nothing there, when in fact, due to their obscured view, there's no way of knowing, beyond exercising heightened caution ⚠️ at all times, especially at 3am outside a bar