Yes, and it is very tiresome advice to see continually, especially when given to newcomers whose first instinct is to build a solid, useful app or service, and they're being steered away from that. The number of times I've read that one should put up landing pages, spend time socializing them, and only if there are enough signups to actually build something is rather depressing.

These folks are obviously playing a different game than I'm used to. But in my ~30 years at it, I can confidently say that taking the time to build what I feel are good apps, well-crafted, has provided immense satisfaction (I can at least look at a collection of apps, not landing pages), and has always developed or honed my skills, which has opened many doors. The marketing-first approach just sounds painful for someone who, like me, wants to be building things.