Agreed - but the countries I listed are served by OW airlines - but only by inter-continental flights from Europe making it impossible - under the current rules - to fly into and then out from one of them on a OW Explorer ticket even though say BA or IB fly to them.

I don't think, but may be wrong, that the situation does not occur in any other continent, and was surely(?) the reason why the Nth African countries were defined to be part of Europe for the purpose of the OWE ticket. And also perhaps why Ekaterinburg has recently been defined as part of Europe since, when it was considered part of Asia, it was impossible go there and back under the rules.