Does she home school to stop school seeing red flags? She reminds me of a parent I work with who behaved like her.
It seems as though her motivation is a combination of:
She has a pathological (and irrational) fear of her kids being bullied if they have to learn to navigate a schoolroom
Huge case of separation anxiety and other psychological morbidities
She arrogantly thinks that she can better teach her kids than professionals can
It suits her beggy freebie trips schedule to not be bound by school timetables
Like most narcissists she likely does not like being made to comply with community rules
Her oldest kid cried when they tried to send him to school, so they caved and kept him home
She is incredibly hostile and inevitably morphs into a victim whenever someone calls her out for her
tit attitude
If her kids skills have fallen behind, you are right they are out of sight of experts who could provide timely help
any and all of that is likely given her own testimony on her blogs, its all public record