I think that this advice cannot be generalized. There are companies with large development teams spending staggering amounts of time solving problems they don't

I think that this advice cannot be generalized. There are companies with large development teams spending staggering amounts of time solving problems they don't have and probably never will and companies burning through whatever goodwill they can find to extract maximum profit by throwing garbage, buggy, and incomplete software out into the market "because agile". Almost no one gets this right. I think the two sides feed off each other by each pointing to the other as an example.