That's not true. There's one bot that routinely posts to news communities called "MicroWave" and there are consistently people engaging with its posts.
It probably doesn't make much sense to mirror /r/technology to /c/technology since that community is already popular and self-sustaining on lemmy.
There are countless other 'niche' communities that have no posts for months, however. There already isn't anyone engaging in these communities and it's unlikely that that will change because nobody wants to manually make posts that next to nobody is going to see. It's cyclical.
I say this, because I've come across genuine morons who live in Texas and have the nerve to scoff at florida while ignoring their shithole state and the one directly to the east of it.
New Yorkers love robber barons and maximizing profit at every turn.
Why would we expect them to get angry at businesspeople enriching themselves at the expense of everyone else if that's what they all want to do?