I think if there seems to be a contradiction between the tweet and the essay it’s only a sort of psuedo-contradiction. The point of the essay (as I understand

I think if there seems to be a contradiction between the tweet and the essay it’s only a sort of psuedo-contradiction. The point of the essay (as I understand it) is that writing about something (as for example in a business plan) helps the writer understand the topic. The tweet says that pg is not interested in descriptions written by someone else. That writing a business plan can be edifying for the startup founder and at the same time of no interest to an investor, is consistent with both the essay and tweet.