If the only speakers that were produced were 2 way ported stand mounts would we know any different.
There is and we do, of course.
But personally I have gone from medium size 2 way stand mounts to smaller 2 way floor standers to larger 3 way floor standers to what I have now and am incredibly satisfied with them in my room playing a wide variety of music.
And perhaps that where the "apartheid" comes from - room size and interaction.
Consider traditionally, the english speakers always always tended to be smaller than American speakers due to average room size. This has changed a it these days with some large floor standers coming from England and some fine 2 way stand mounts from the USA.
While I'd love a pair of Dynaudio Temptations or some Martin Logan Hybrids but they simply would sound terrible in my size room.
Possibly wise to remember that people do try to dumb down discussion about high quality music and its reproduction. Lowest common denominator communication is known to sell more things. I suspect that is where the idea comes from that xyz brand/model of speaker is best suited to abcd type of music.