A few anecdotes and pictures of ”look it didn’t get damaged” isn’t the same as ”this is a good way to pack your bike”
Obviously, it is easy to critique and preach best practices regarding packaging bicycles for air travel. There are full metal cases (
https://buxumbox.com/), which can be considered the gold standard. However, these cases have major compromises, and they are useless for point-to-point touring. It's unrealistic to expect someone to find a bike box or other robust packaging material when completing a long tour, especially if in a developing country or smaller town, regardless of the country.
As stated earlier, clear packaging informs the handlers that they are processing a bicycle and treats the item as such. I have travelled with my bike at least ten times internationally and within N.A., in a clear bag without issue.