Some thoughts...
"It's massively irresponsible to promote home education in my opinion."
It's really sad that you had such a negative experience, MrsFilly, and it sounds like your parents home educated you for the wrong reasons. There are many kids, though, who are deeply, traumatically unhappy in mainstream education, and home ed/online schooling/alternative provision can be, quite literally, a lifesaver for them. To say that is shouldn't be 'promoted' (ie people shouldn't be made aware that it is an option) is massively irresponsible, in my opinion.
I also think the OP is pretty snidey. How do you know that her kids spend all day on the iPad and only go to museums once a month? Are you there with them the whole time?
I HE'd DD for 3 years during the primary years, and we spent LOADS of time on the iPad... because it's a fantastic educational resource. It depends what apps they're using, and whether she's supervising, really, doesn't it.
Shedmice don't let this thread put you off home ed for your kids if that's the right thing for them. There are many, many (infinite, really) permutations of home education, of which unschooling/autonomous HE is just one (or many - it can range from the wonderful to the appallingly neglectful!). My DD has attended an online secondary school for the last 4 years, and is thriving there. The school is growing year on year with kids for whom mainstream hasn't worked - unmet SEN, school refusal due to anxiety, bullying that hasn't been dealt with, many reasons. There are many options.
I know lots of home edders, from the structured through to the unschoolers. I'm not personally a fan of autonomous/unschooling, but when done well, it can be a legitimate choice. The two I know who have gone the total unschooling route, though, I do have my doubts about how that's going to work out now that they're approaching GCSE level.