I think it's because Nintendo does generally go heavy on the casual Wii like pillar or handhelds. Obviously Nintendo is giant in the market and belongs in general discussion with the other two, but because the Xbox and Playstation brands are generally going for the rather one dimensional "who hasss best graphics!!!" fight, it sort of creates more room for direct comparison
Nintendo is like the third wheel on the front of the tricycle doing it's own thing while the two back wheels fight back and forth. (maybe kids in a car would be a better analogy for that but oh well)
You'd be shocked if you looked up these 'comparison' videos how often they're strictly on the same subjects of hardware specs, individual game graphics, round and round and round
if anything I think this is a good thing for Nintendo because they have their own identity. They do their own thing so well that they don't really have a competitor; i.e. the casual/family market is their thing
even though sometimes it's total bullshit PR talk, Micro/Sony are right in some respect when they mention that a lot of people, especially families, may very well buy one Sony/Micro system and then also buy something like the Switch (or a Nintendo handheld) on the side. I.e. the implication is they can live alongside one another because they're so different
often it's "pick either Xbox or Playstation", meanwhile it's less likely to have someone deciding "pick Xbox or Switch" because they are so incredibly different. Obviously I do think there are plenty of instances where if parents by their kids a Switch for their birthday they aren't going to buy a competitor's system as well any time soon, but as an overall thing it probably is true that a lot of people have multiple systems
There is this weird obsession these days with raw numbers and specs, and while I've fortunately noticed consumers kind of edging a bit away from that (probably due to a lot of technically advanced games being shit and lacking soul), it still seems like the articles/media/Youtubers love to make those sort of videos. Probably because it's an easy formula and as simple as comparing details in images or hardware. Obviously Nintendo doesn't enable them this same easy comparison since Nintendo is not graphics obsessed like the other two companies
