All speculation isn't equal. There's a difference between informed speculation ("Based on my expertise, I think it's likely X will happen"), philosophical speculation ("What if X happened? Well, here are some obvious consequences…") and idle speculation ("Duuude, what if 'woof' is just dog-language for 'moo'?"). I think people probably didn't see anything to take away from your comment, and that's why they're downvoting, not because their minds are closed to speculation.
Hmm, that's a pretty serious writeup about types of speculation for something that isn't exactly off the wall here. If people thought, "there's no takeaway here" and then downvoted, as you said, that goes against the spirit of open-minded discussion. They should simply ask more questions or go find something to upvote.
If there exist other life forms with consciousness, the question of whether they share consciousness in the form of shared archetype is not a question with no takeaways. It's important stuff to consider! The implication could be that a life form found on Earth is in some way multi-planetary, for example, and part of a wider consciousness-granting bio-system.
I didn't downvote you, but you had me at "shared consciousness". Since no neuroscientist or philosopher can definitly tell what consciousness is or how it constitutes, speculations about a "shared consciousness" is idle at best, more probably than not its just plain wrong. Since I don't want to spend time with idle speculation about concepts that are not explained by physical reality[0], I categorized this posting as: "esoteric" and went on. I can only tell you about my reasons not to take this posting serious, but I think others might have similiar reasons.
[0]: A "shared consciousness" must communicate in some way; no signals (in the form of either electromagnetic, gravitic, strong or weak nuclear force) have been detected that could accomplish this.
Thanks for your comment. I think I understand, but I guess I look at shared consciousness as a continuum from "obviously exists" to "highly speculative". In its more obvious form, you and I probably have some sensing hardware in common (not 100% sure since I don't know you, but maybe we both have eyes, for example) so we may share light-consciousness, sun-consciousness, etc. Through one very simple lens humanity can be seen as a mesh sensor network that shares the "consciousness" product. In this way I would expect that any form of life with e.g. a nervous system and means of communication (or even just reaction which leads to chain reaction) can at least in basic ways share its consciousness.
On the speculative end perhaps you'd have phenomena like shared intuitions or visions; however that's still a gradient; in some fields like Jungian psychology these are seen as products of a long and convoluted physical sensing processes, not as magic, for example.
