I'm sure what you're talking about is a lot of people's worries. Including me in it.
I also believe that what you are talking about today will someday or at least in the not too distant future will change. The "reblog" restriction mechanism will become a reality.
I agree with you Mr. , it should be limited so that someone chooses what to reblog.
The tendency of a person/community to reblog a post at this time just because of the pursuit of points or wanting to appear paying attention. Even I dare to call it attention seeking.
In my opinion, the mechanism to reblog a post is not only limited as you say, but also must be accompanied by an argument column that explains several reasons why someone or a community chooses to "reblog" a post. That would be fairer as a liability and it would actually separate out what was trash and what was quality.
RE: Scarcity on hive - Thoughts on reblogging