So I'm gonna ignore that weird insult tangent you went on....
The reason people consider it spam (even if a human clicks a button):
There are "services" that pull every post from somewhere, and either automatically post it, or put it into a queue that a human then decides if they want to hit "post".
When down from places like reddit, that is a problem because it drowns out every post a human saw organically and wanted to share. That is curation, that a live human on the site saw it and wanted to share
An account that posts everything it sees somewhere else, drowns that out and lowers the percentage of posts where genuine engagement will happen.
Especially on a small site, that fractures the user ase between all the threads. And the same amount of people are spread to thin.
When a fediverse account does that to repost stuff already on the fediverse but just a different instance, it's also unnecessarily propagating the server load, but still fracturing the user base.
Instead of a single conversation happening, now there's a dozen threads all of the place with one person feeling like the fediverse is empty.
I can answer more questions if you want, but if you just keep throwing around insults, I'm just going to block