Your eyes should be scanning at all times. Those 'experienced' drivers have literal blind spots and are likely to enter a mental state akin to a sleep state.
https://article.images.consumerreports.org/prod/content/dam/...
It talked about novice vs. "skilled, competent" drivers, which suggests the latter meeting some threshold beyond just experience. (Making their behavior even more likely to be a demonstration of skill and safe technique.)
Sadly, sites like this are full of ignorant, unskilled, overconfident motorists who don't like correct advice.