No. Just, no. I mean, just look at Krynn... no orcs!
That is why I said "all
or most." And of course, again, that's just a figure of speech. I have no idea if Hickman and Weis designed owlbears into the setting, but they
could be there (actually, Krynn is an interesting example because, to me at least, it feels less "D&D-like" than most other settings).
Of course there are variations and of course there are exceptions, but there is a corpus that all D&D worlds draw from. I would say that there is no dividing line between D&D and non-D&D, but that it is a spectrum; furthermore, once you get a certain distance away from D&D tropes and themes then you end up in "non-D&D." It still might be fantasy and have similar themes, but it would be without a significant number of characteristic features that the lion's portion of D&D players would recognize.
In other words, a D&D world without drow isn't necessarily not a D&D world. But a D&D world without 99% of the monsters in the various monster manuals, without most races and classes, without certain basic themes and assumptions...well, it stops being "D&D."
You can get any random number of people together and say "let's play D&D, roll up 1st level characters" and the vast majority of D&D players would have a basic sense of what to do, what is expected, what the options are. Of course each campaign will be different, each setting and DM, but very few people are going to ask, "Can I play a xygomorph plasma technician?"