If you browse the forum on any given day, you will find 8 "Elves are the only worthwhile race to play" threads and no threads at all about the worthwhile qualities of other races. It's toxic. If you like playing dwarves, qunari, or - Maker forbid - humans, and if you dare to post about it, you will soon be "shown" the "error" of your ways, completely ignoring the fact that other races are part of the world, that each race has its own lore, culture, and traditions, and that each race has a number of entirely worthwhile qualities to recommend them. And if you are posting that you enjoy playing as a human, well, you're going to be buried under a metric ton of hate, so you should probably prepare for it. So fandom persecution is probably part of it for a lot of people. Yeah, players should base their opinions on the game itself and not the fandom, but "Oh, great, more effing elf shite" is an understandable reaction.
And yes, it is possible to play Dragon Age Inquisition as something other than a Dalish female romancing Solas and still enjoy the game. There is no official canon Inquisitor, so Cadash is every bit as relevant to history as Lavellan.
The game itself does tend to neglect the lore of other races in favor of all things elven, which is a shame. Dwarven lore is every bit as fascinating as elven lore, but we've barely scratched the surface of it. It's hard to separate human lore from that of the Chantry because they tend to be lumped together (and promptly dismissed), but Andrasteism isn't the only thing humanity has going for it. The nuances among the various sub-cultures are there, but you really have to dig for it. One of the things I enjoyed most about Jaws of Hakkon was that it explored a culture that had little or nothing to do with Andrastian Thedas.
TL;DR: Nobody likes to feel marginalized. You can't really expect someone to embrace your choices after repeatedly condemning theirs.