Because the target audience likely doesn’t know much about computers, and the stock buyer likely knows as little, so the stock buyer can pick whatever looks compelling. The stock photographer is just chasing the trends.
Keywords also create a bias. I doubt most buyers are searching “land grid array”, but “soldering iron” is synonymous with anything electronics/hardware related.
A lot of nuance will be missed without some gradation between “I <3 China” and “Down with Pooh!” For example, if we added “Slightly favorable”, “Neutral”, and “Slightly unfavorable” we would begin to see just how favorable younger generations are. Rather than presume there is a deep divide on trade policy, if two bars are almost equal, we may see they are largely neutral. Similarly we could see just how favorable their views of TikTok really are by looking at the spread between neutral to “I <3 China!”