@atomicpoet My knowledge of her is entirely based on her appearances on Twit. Most of the time I tend to agree with her opinions, so I definitely do respect her.
As far as I can tell, she's been a very heavy used of twitter for a long time, and when read in that context, the comments makes sense. The flaw in the reasoning is obvious to someone who has been here for a long time, but I can see the frustration from someone who is used to the birdsite.
I mean, of course it makes onboarding easier if the mobile application defaults to m.s. No even the staunchest of Fediverse fanboys (fedibros?) would disagree with that. It's not a good thing for the Fediverse as a whole though.
My personal idea for a while has been to somehow make it really easy to create a fork of, say, Tusky that is branded for your instance. Then if someone wants to join jorts.horse, they go to the appstore and download the jorts.horse application. This would have the additional benefit of aligning with a rather large group of people who can't really tell the difference between a mobile application and a website.