Aunt Jane likely didn't even want or might not even have a smart house in the first place. That's perhaps the thing you're missing here - your average person do

Aunt Jane likely didn't even want or might not even have a smart house in the first place. That's perhaps the thing you're missing here - your average person doesn't give a shit if it's "smart", they just want things to work and the only difference for them between "it's smart" and "it's dumb" is if the remote they're fiddling with is their phone, an on-device button or a regular remote (as well as how likely it is that they get spied on externally). Your average person's ideal amount of exposure to code is zero (as in, most would prefer to not even think about code). If the device isn't automated from the getgo in an easy way, then Aunt Jane has no smart device and no matter how easy it is to write the connection, she's not going to have it unless her niece shows up. You're severely overestimating the desire for an everyday person to automate their home. Most people are perfectly fine manually flicking light switches and unless you live on a very specific schedule, often automation ends up falling short of practical reality, so even the majority of people who "automate" just end up moving the light switch to their phone.