Sony is not at Nintendo's level but is nearing it.
Now total 1st party software sales, Nintendo is still notably ahead, but my point was that Sony has almost equal 1st party IP strength while having every third party competing in their ecosystem. Hence why this is unprecedented since the SNES/NES days. To out it into perspective, PS4 is approaching 1.5 billion total games sold. SW is at 450 million.
At 3 years and 3 months, PS4 was at 400 million software sales.
At 3 years and a half, Switch was at 450 million software sales.
Now, I don't think anyone expects the Switch's software total to be as good as Playstation 4's - or at least it's pretty unlikely. But the Switch was, and possibly still is, currently outselling the Playstation 4's total software sales. With less big triple A games overall and with almost no price cuts for most of their games.
It's simply disingenuous to throw out a figure like that and expect it to land. It's like if I told you that Switch first party games have more competition than Sony first party games because, technically, Switch has more software available on the platform overall than the Playstation 4. It just doesn't have context behind it, so the figure makes no sense to just throw out as an argument.