That's a pretty big spin to try to paint stable sales on Switch as a bad thing. It's not Nintendo's fault PS is failing. If third parties want to stay relevant in Japan, there's a simple answer, support the only console Japanese gamers really care about.
Isn't exactly what Konami is doing ? They are still unable to transfer their past sales from PS4 to Switch
Switch being successful on itself isn't a bad thing. Being the ONLY successful console in a market however is. Never said anything about being Nintendo's fault, however is clear third parties aren't recovering anytime soon