IMO, it’s a centralized thing.
Many years ago, there was a site called MySpace. It was so popular, it outranked all of the search engines, even google! It was true freedom.
Instead of having to pay to be included on searches, like Yahoo, or some magic BS big-wig, like Google, you were good, based on your word of mouth, and how good you were. This allowed independent artists, musicians, and businesses to compete on a level playing field.
However, centralized media, aka, “Big Tech” would constantly harp about FaceBook & Twitter. “News outlets.” Everything was those two. Why no talking of MySpace? Eventually, the masses went there, which is where the money is.
BTC was the first, and biggest, so it’s hard to ignore it. ETH, from what I understand, is heavily developed, and influence, by “Big Players,” which is why it gets better coverage than ETC, or LTC…despite LTC being around longer. I’ve always had a soft spot for LTC, myself.