I agree completely. In the Borderlands thread, especially, I couldn't believe that people were trying to disparage the series and make it seem inconsequential.
Simply put, you can't expand a market without content that expands the market.
If I own a store that sells apples only, I can't get into the market for oranges unless I actually start to sell oranges. The content has to come first.
What if Nintendo landing Borderlands 3 resulted in some Nintendo fans finding out that they liked FPS RPGs? It could help grow Nintendo's ecosystem further and convince other publishers that there is money to be made with Nintendo.
The more games the Switch gets, the better.