Completely agree, but the "solo regular person takes on the Internet" narrative has often been more effective than the "solo regular person tries to be perceived as multinational corporation" narrative, depending on the audience.
Do you have any idea what the Angry Birds developers look like? Well most of their users have no clue because promotion and the development team don’t need to be connected at all.
1) Funny, because the app I was interviewed for worked out exactly like that. I haven't spent any money on marketing and done very little to promote it. People just like the app and tell their friends about it.
2) You're confusing marketing a person and marketing a product. Who cares what _any_ of the developers of an app look like? Seriously. People care than an app solves their problems. That's it. End of story.
How "professional" the developer of an app looks in a photo has absolutely nothing to do with the success of an app.
Build junk people want and quit worrying about how "professional" you're perceived.