I agree up to a point. Not all beginner vapers are comfortable with building their own coils right from the start. I know when folks first began rebuilding coils, that I resisted the idea for a long time. I was relatively pleased with my cartotanks and saw no need to get into rebuilding.
After several months, I finally decided to try a rebuildable tank just for the experience. I got an AGA-T2, a Genesis-style RBA, which in hindsight was probably the worse RBA to start out with. I became frustrated with it and shelved the idea of rebuilding for another 6 - 8 months.
Then an ECF friend gifted me an authentic Kayfun Lite Plus rebuildable tank. I gave it a whirl and was amazed with its simplicity and the overall experience. I then purchased a rebuildable drip atomizer, and now use one or the other exclusively.
I have an Aga T2 !. I also have about a square metre of 400 ss mesh sitting in the same box the Aga is relegated to,

, along with all my other junk, you know !. I just couldn't get used to using ss mesh for a wick.
I can kind of relate to your point about new users not being able to build coils, given the complications of ohm's and battery safety. Really though, to be honest, it isn't at all complicated. I find a lot of posts, here in ECF, warning new users about building coils. And i think that maybe it would be better to encourage new users rather than scare them off. So giving them the basics in the most concise way would only take about a paragraph or so. I think the best way to encourage new users to build their own coils is to explain that a rebuildable device is something that is designed to be used and re used and isn't in any way disposable, whereas a device that cost just a few £'s or $'s or whatever can only be used for a limited period of time before is has to be thrown out. I love the whole idea of My authentic Kayfun, the solid build quality, the ability to strip it down into all of it's component parts for cleaning, it's just such a perfectly engineered piece of hardware. It means never having to buy another atomizer, which was the whole point of buying it in the first place.

. If people are happy using a device for tooting which performs in a similar way to the device they started with, and not something that creates clouds big enough to make people think another weather front is moving in, then a good quality rebuildable like a Kayfun would be the perfect choice, it just happens to involve a short learning curve, which shouldn't be a problem, not for a grown up anyway.