It really does depend on the reasons and set-up!
Personally, I'm afraid I'm a little biased in that two out of three families I have known to choose to HE have been doing it for purely ideological reasons:
Family #1 is extremely religious and, from my outside perspective, just seems to want to avoid their children learning anything at all useful about sex and reproduction. I'll have to admit: I'm pretty horrified!
Family #3 is not traditionally religious but deeply into conspiracy stuff. Unfortunately for me, I know them because dad reports to me at work. That'll be the same bloke whom I've had to threaten with disciplinary action due to him loudly voicing his opinions (which would, as such, be okay to a reasonable extent) and making other colleagues deeply uncomfortable (this just isn't - this is a workplace, not speaker's corner!). From what I know, the three kids are currently being taught "actual facts". Again, I'm deeply concerned.
Family #3 I totally understand: they have opted to HE daughter #2 (out of a total of 3) due to some utterly horrendous bullying at multiple schools running. From what I know, daughter is both academically gifted and supremely socially awkward. Still not perfect, I suppose, but: I'd sooner have a child HE'd, hoping they'd grow into the "other people" thibg eventually, than spat on and beaten on a daily basis.