Everyone and especially the arduinists themselves.
> people than you might get interested in electronics as a hobby. wow.
People get interested in Arduino, not electronics; they get interested in the bling, not how it works. Instead of wasting time with Arduino, they can as well just read the datasheets.
People learn different ways and are motivated in different ways. I'm motivated to learn top down in electronics. Arduino is helpful to that crowd.
> I'm motivated to learn top down in electronics.
Very dangerous and potentially deadly approach (electric shock, battery caught fire, floating inputs cooked the processor etc.) Electronics is not programming: errors have tanible consequences.