I have met a fair few home ed. kids over the years, I have found them to be well balanced, interesting and confident.
Of course Home Ed has the potential for good or bad experiences, as does school.
A couple of families I know now are 'good' at home educating - wide variety of stimulating activity, and social contact. However I do feel a twinge of concern that the views of parents on thing like anti vaxx are strong and do these children get exposure to different attitudes/views?
One of the children has decided to go to school at 13 and really enjoys it.
I just think you have to be aware of the pitfalls. Mainstream schools have their downsides - peer pressure, conformity and MH, online porn sharing, bullying, one size fits all, unpleasant teachers. 1 teacher to 30 children does not always allow for close observation of progress or difficulty.
I can well understand parents of kids who do not fit the system going for HE. We have huge struggles trying to get an appropriate education for DS who has various SEN. The hours spent on battling paperwork and bullsh*t are hours I will not get back to spend with DS.
I think most people are fairly reasonable, and trust that they will get on with providing a decent education for their children.
How you overcome violence against children, whether in school or out, is a difficult one. DV can be hidden in plain site either way, even when there is oversight. I am broadly in favour of the right to HE but I would not object to a visit from the LA to check if DS was OK.
I know some HE folk fear this opens the door for enforcing a type of education they wish to move away from (for example, National Curriculum rather than unschooling).
Interestingly, we actually have not had mass schooling for that long (in the context of history), it was partly a social response to industrialisation.
I am not anti school, I think for some children it may be a relief to escape from home. Though I do fear that it is letting a lot of young people and children down. A lot come out barely able to read and write, and with crippled confidence, never mind passing 9 GCSE.