For me the variety of sentient species in D&D (and I include the contents of the monster manual) cannot be taken seriously, so I don’t. It sounds like you are looking for a more grounded game than fits the standard 5e rules. It’s OTT high fantasy, so it attracts players who like OTT high fantasy.
I just play with similarly minded people (who like Pratchett, Star Trek and Monty Python). I’m afraid I would tend to avoid playing with a group whose tastes were very different.
This I find strange, in that I prefer Science Fiction to Fantasy, and thus I prefer an array of diverse aliens to...
Indeed, these things have no intrinsic value, the only value they have is what the purchaser assigns to them. Concert tickets to a band I don’t like have no value to me.
Likewise, this product has no value - to me. It’s not a matter of cost, it could be being given away and I wouldn’t bother to...
Aasimar aren't from anywhere. They exist because some dirty deity got up to some hanky panky with someone's distant ancestor (Zeus, stop pretending to be a shower of gold, I know it's you). There is no land of the aasimars.
They are pretty much all human (with a small number of other species as minorities) settlements in the vast majority of published materials. But that isn’t representative of the world. Orcs are a core species, and in most settings a group of orcs will avoid human settlements and visit orc...
Pretty much every D&D setting is well over 99% human, so by your argument, the only core species available should be human. Gygax tried to make that so back in 1st edition, by nerfing the other species into oblivion, but that didn’t stick.
And in most D&D settings, elves and dwarves are...
This is the big problem really. And those who complain about the existence of products, because they haven’t understood that they don’t have to buy them.
I don’t think number of sessions is indicative either way. If you are using xp I would imagine you tune your xp multiplier to give the desired rate of progression. Likewise, if you are using milestones, you will position your milestones to the same effect. If you are using something else (eg...
Tic-Tac-Toe was a game before the movie. So obviously it's included.
Jumanji was a fictional game. The actual game was based on the movie. It doesn't count.