I recommend taking a look at the full original article, the summary linked here may be a bit misleading. https://www.midiaresearch.com/blog/most-gamers-prefer-single-player-games
This breakdown chart, in particular is very interesting. https://www.midiaresearch.com/storage/uploads/paragraphs/dbdbaba91de72cd615d8be1a0119cfca
Turns out that yes, slightly more than 50% of the people they surveyed prefer solo, but that's distorted by older people going HARD towards that option. Every segment below 45 years old skews slightly towards multiplayer, although the split between what type of multiplayer is pretty even.
Gotta say, I HATE that PvP is the preference across all age groups among multiplayer fans. Outside of asynchronous competition, leaderboards and fighting games I profoundly dislike realtime PvP.