I hear you. I just really do not like the word "chained." It has such a negative connotation. But there are so many other races in D&D and so many other cultures. The two worlds look nothing alike outside. Seems to me if there was any apt word to describe its relation to Tolkien, it would be "holding hands."
I think the negative connotation is entirely appropriate, and would use exactly the same terms for similar stuff. For example, I'd certainly say that even into the early 2000s, comic books were chained to the (misunderstood and misapplied) legacy of
Watchmen, The Dark Knight Returns, and
God Loves, Man Kills, making 20 years or more of grim, depressing, edgelord comics that forgot the spirit and fantasy of superheroes. Despite drawing on a wealth of good, thoughtful work, the derivative or imitative follow-up was often just...not good, or good but held back by its need to be Extremely Mature And Dark.
Taking reference and inspiration, responding to familiar classics, recognizing there is a genre zeitgeist....that's all fine. But why is it ABSOLUTELY EVERY high-fantasy universe has to have pointy-eared long-lived forest-dwelling innately-magical often-haughty people, AND bearded martial tradition-loving underground-dwelling often-surly miners, AND the two must always dislike each other for poorly-explained reasons? I mean for goodness' sake, even Dragon Age did it, and they barely even tweaked the formula (our elves WERE classical, until one of them broke magic and made them mortal! Our dwarves are...pretty much identical to Tolkien dwarves!)
Tolkien deserves his place in the canon of fantasy. Undeniably. I just wish that that didn't mean that 95% of campaign worlds were "Tolkien with the serial numbers filed off," and half of those being "...except the cultures are hollow stereotype Planets of Hats because it's way easier to just superficially imitate Tolkien than actually do serious worldbuilding."
Is D&D incapable of escaping from Tolkien's shadow? No. Plenty of games do. And there are even games that do actually manage to thread the needle of "follow Tolkien non-superficially but also not too rigidly." But I don't see how anyone can argue that D&D gamers as a whole have a problem with being extremely stuck in only one small corner of the enormous space that fantastic imagined worlds have to offer.
As I have said before in other threads: We have the freedom to create ANY world we imagine--so of course every world we imagine is
exactly the gorram same.
We have the entire field of human imagination to play with, yet we choose only to play in one sandbox off in one corner. It's a lovely sandbox and its creator left some great toys in it to play with. As with any sandbox, there's nigh-infinite variation to be had without ever leaving its confines. But that is no reason to cling to it so tightly (and especially not to keep building the same damn castle in it over and over and over...) that we forget the entire rest of the playground in the process.
Or for a different analogy: pepperoni pizza. Not my favorite, but I totally get why it's popular and omnipresent. But if pepperoni pizza were the ONLY variety on offer at EVERY restaurant in town, it'd get old quick. I wouldn't feet at all bad turning New Pizzeria B's pepperoni down without trying it, and would respond rather poorly to "well you don't know what twists THIS restaurant put on it, maybe you'll enjoy it for the unique and subtle differences!" Especially when my experience says there's at least a 50% chance that any given restaurant actually uses the exact same premade frozen pizza....