Why would an end user care about the version? 99% of endusers won’t ever open the inspector on.. any website.
If a end user wants to find out what the software is being used, he probably has access to a desktop and has the proper knowledge to do so. If not, and he would be so savvy to click on a Powered By link, he probably read the discobot message too and was already lead to discourse.org Trust Levels article.
Also I’m pretty sure Discourse is mentioned in the FAQ:
“Discourse provides tools that enable the community to collectively identify the best (and worst) contributions: bookmarks, likes, flags, replies, edits, and so forth. Use these tools to improve your own experience, and everyone else’s, too.”