I can only upvote posts, I cannot downvote any posts.

Not a mod, but this came up here: https://beehaw.org/comment/29314 and is linked in the Beehaw FAQ post about downvotes being disabled. The context is in the comment thread linked there.

From what I understand, the main reasoning was that if you want to disagree with someone you have to put some thought and effort into it such as a comment which could be a jumping off point to a discussion.

Downvotes are disabled because they add nothing to the conversation/discussion

Downvote are disabled on this instance. Its not a bug, its a feature!

In general, not talking directly to OP, it is important to read about the instance you're joining to make sure you're in the right place.

The "no downvoting" was the selling point for me on this instance. Love it.

You like; you vote.
Don't like; keep on scrolling.

If I were to post an opinionated piece or even comment, let's say, "Cryptocurrency is a scam," and I start getting loads of upvotes this post might be "hot" or whatever. But, then the Cryptocurrency gang rolls on in and starts downvoting me to oblivion. Now it looks like I posted some silly nonsense. People aren't even going to look at it. What if I had just given the most awesome advice or perfect answer, and just because someone on the net disagrees and things I am wrong it starts a battle between strangers?

No. Thank you.

Can someone explain the rationale behind downvotes being disabled?