This comes from the flexibility to add more than one tag. Glad to have your feedback, stuff like this is very important. You might need a more specific tag to get your content it looks like everyone is using Steemit to try to get their posts known. I suggest best flagging practices (what ever those are) to keep this cleaned up.
I'm sure the content finding algorithms will be improved though after the security work is stable; developers use the platform too.
You're absolutely right. If we equate subreddits to tags, it would be like being able to post on reddit to two subreddits at once. It's an interesting situation and we may have to look at other platforms that allow browsing like pintrest.
I'm browsing the tags now, I'll add more that make it more applicable.
On a side note - I think it's funny that since I had #beauty in the content it was also auto tagging the post with #beauty, even though I didn't pick it. That might be another thing to look at.