I still don't know if NintendoSoup is a good idea to keep sourcing with all they do, but if Falcom said this then they aren't really wrong. Switches are comfy and easy to use which makes them perfect for people on the fence about a new gaming system.
After all, I've seen parents in stores go "why should I buy my kid the Xbox One/PS4 if he has the other system?", but not consider the Switch to be similar enough for them to hesitate on. Most people I've seen buying it for their kids think of it as a handheld, which it pretty much is. The fact it looks nothing like the 3DS or Wii U helps a ton too.
I do think Falcom will license stuff out a bit more, probably. I expect Ys I-II and Oath to be on Switch sometime in the 2020s due to the mobile ports/basic nature of those games, and if a PCE VC or similar lineup comes out, we'll almost certainly get I-IV in Japan. Here's hoping they at least do that even if it's far safer for their newer in-house games to stick to PS4/PS5.