Does a typical home have 30 outlets? You have to remember this product should work for as many people as possible. Not everyone will have a large number of unused outlets. Also, as I’ve already pointed out, tapping into lighting circuits is illegal in many jurisdictions plus a transformer plug as you showed above in the adverts for Arlo etc will not fit inside an typical Outdoor IP rated socket as the the typical transformer plug is too deep to allow the waterproof lid to close. Another potential issue here, even if you could find an IP rated outdoor socket able to accommodate a transformer plug, it would probably overheat in such a small enclosed space.
Bit puzzled by this. Why would you need an ethernet cable going up your lounge wall?
As I’ve already pointed out above, the beauty of using a poe hub is it can be sited potentially in a loft or cupboard out of sight with the cables for all the cameras exiting from the house at that one point through a single hole in the wall /eaves. All that’s required internally is a single ethernet cable to the hub from the pc’s location. In many homes that’s an office or bedroom, not a lounge.
Going down the USB power route as per the cameras you mentioned above means multiple power plugs adaptors (1 per camera) in every room near to a camera and a USB cable up a wall in every room with a power adaptor. That’s a lot of cables on view in your rooms as opposed to a single Ethernet from the pc to a hub, or to put it in simple terms - 6 USB powered cameras = 6 x USB power adaptors in sockets in 6 rooms in your house and 6 USB cables going up 6 walls plus 6 holes drilled in you external walls. The same 6 cameras using POE = 1 cable from the pc to hub location. 6 cables from hub location to the cameras but through a single hole and in single room which can be an unoccupied space such as a loft, or cupboard etc. Much more user aesthetically and user friendly.
I’ve had no bad experience of wireless. I know it’s limitations as do professionals which is why no professional installer or organisation touches it with a barge pole usually if it can be avoided. Users of the existing WYZE have commented on how recordings can be lost with a drop and cameras can fail to reconnect - it’s unreliable in that regard and can leave you with hours without coverage, the bandwidth and thus speed drops off with distance and through walls, plus the bandwidth is insufficient to stream both a main and sub stream at the required quality, with numerous cameras in play. Interference from nearby electrical devices etc can cause interference and drops.
That said, as said before, I understand the convenience of wireless to those who might be averse to having any wires for data, even USB and to that end, I don’t see any reason why the outdoor camera couldn’t potentially have both Wireless and POE giving the option to users as to which they use especially if quality settings were tailorable to the chosen transmission medium. That’s a way to please most people.
They don’t market it at all, as it isn’t out yet. 
That said, the existing indoor camera clearly has it roots in security. The Wyze home page shows it being used to observe prowlers outside the house and babies in their play rooms. That sounds like a CCTV camera advert to me.
I would regard security as the number 1 reason for buying one of these cameras. People may have different many uses and there’s no reason why people shouldn’t use them for many different purposes. However, take a look at any of the web sites or pictures accompanying Ring, Nest, Arlo etc, and you’ll find they’re all marketed primarily if not exclusively as CCTV cameras for home security purposes, not trail cameras, wildlife cameras etc but security cameras as that’s where the main market lies. Again, no reason to accommodate so far as possible those other uses, but lets not be deluded into thinking people using a WYZE instead of a purpose designed trail cam is it’s primary market. It’s a niche use.
You’re right the security market is crowded, and what it lacks atm the moment is a cheap camera that can deliver the sort of quality seen from eg a Dahua IPC-HDW5231R-ZE or in higher MP a HFW5241E-Z12E AI Varifocal Bullet. The company that can deliver that for $50 or $60, is onto a winner.
