I genuinely don’t know what point you’re trying to make. You’ve repeatedly asked (very dumb) questions to try and justify actions by a head teacher that simply aren’t justifiable and your suggestions make no sense. Then, when that was pointed out, you’ve responded with unintelligible nonsense.
OP doesn’t need to know what her almost adult child’s school day looks like. I don’t know any school (for any age child) who contacts home when a staff member is being covered due to illness, childcare reasons, or being on a course etc so why does OP, in your view, need to know when they’re off due to strike action? Equally, if she needs to know what the day looks like, she should be told the teachers who are in and who are teaching her child - not the ones who aren’t.
It’s relevant whether the headteacher is openly in favour of or opposed to the strikes or silent on the matter because it indicates her motive for doing this. Clearly her behaviour was unprofessional and unacceptable but, if she were in favour of the strikes then it’s possible she had a genuine motive but made a poor judgement. It’s highly unlikely, given that she’s publicly outlined her opinion against the strikes, that this was an accidental error in judgement but is far more likely to be an intentional, malicious act.
Your repeated asking of inane questions and your faux ignorance is irritating, you’re not fooling anyone by pretending you don’t understand.