Well if we disregard third parties, then both the PS4 and XB1 has had similar droughts. XB1 has probably had even worse ones.
I was thinking something similar.
Sure, third party games don't count towards a first party release schedule. But because of third party games I've never noticed a drought. For PS4 there's Resident Evil 3, Final Fantasy 7 and Persona 5 Royal in the next few weeks for example, so it's not like Sony only having Ghost of Tsushima and TLOU2 left for the year is something that I consider. And Switch's third party situation is much better than WiiU's.
But if you much prefer the first party games, then a drought can be an issue. Though Nintendo is just one company, albeit a very big one. I don't think it's fair to expect them to never have gaps in their schedule. It's not like any other one single company does better on that front.