Dragons, where did they go?

— Slodius Rex

A look around in any village or town will relate to you how almost every race of goof creature lives peacefully. Half-orc, the woefully misunderstood race, can neighbor Elves, Humans neighbor Tieflings. This has been since time immemorial.
You will also notice the lack of lizardfolk, or reptilian races. This extends all the way up to dragons. While the lizardfolk and Yuan-ti most definitely exist, they are shunned and have been about as long as the rest of us have lives peacefully. The same cannot be said of dragons. There is no real evidence of their existing apart from ten-millennia-old pottery found in the remote hills of Mil Bazon and Lochish. There are no bones, no shards of teeth or claws, or even scaled armor. For all we know the dragons are, in an underwhelming fact, a myth.
Yes, there are accounts of dragoborn, but those do not prove that dragons were real. For all we can surmise, the dragons mentioned are merely exaggerated dragonborn, elevated to laughable proportions. Of course, dragonborn are, on the whole, resembling their supposed ancestors lust of shiny golden things and disgust and hubris about mankind and humanity.
If anything, dragonborn are the unfortunate ones here in that they are compared so regularly to dragons that their stigma is, for all intents and purposes, draconic: they are dragons to people arond them. It is very unfortunate they only live far into the hot depths of the Deadlands, or else maybe some conciliation or at least compromise could be reached.*
Another point that I will address is the existence of dragon-killing creatures like behir. Behir were created by giants long, long ago to supposedly kill dragons. Again, I believe the behir were merely siege weapons against dragonborn that roamed in freedom before being pushed back to the Deadlands. Since no giants at this time are willing or amiable hosts and conversationists, we may never know.
The caveat to all of this, of course, is the fact that several deities are dragons. Tiamat and Bahamut. These two are always on the lips of those who think they can discredit this idea. While yes they do exist and several people have gone and documented them, they do not exist in the Prime Material Plane (P.M.P.). Their influence, I believe, is what gave us the dragonborn.
Dragons, I think I've made clear, do not exist, at least as we know them. They have not in the P.M.P. though outside of this shackling place anything is possible. It makes good sense that deities would fashion some humanoids in their own image, hence dragonborn, but not making exact duplicates of themselves. Behir's existence could also be related to dragonborn conquests as well and their subsequent besting by giants in their realms of Daeg. Dragons as we think of them either are the best stealthers and invisibility-casters to evade us this long without trace, or, as I firmly believe, do not exist.
*Author's note: I usually refrain from these puerile platitudes of grand world peace, but I think in this case a severe lack of communication and understanding is the chief villain here.