[quote Amboseli]@bizboz this government is completely and utterly useless, and Gavin W is the worst of the bunch. Why he's still there I just don't know. They've messed every single thing they've faced since they were elected.[/quote]
The govt is useless, on that we can agree.
But they are responding to public opinion. I might have misjudged it, but in recent weeks, seems to be becoming increasingly tired of ineffective, unjustifiable or open-ended restrictions.
It's easy to ask a rhetorical 'why not ... just in case', and apply it to mask wearing, window opening, distancing, etc.. While the cost per measure isn't directly a lot, it is overall a ton of work for teachers and headteachers to administer. Frankly, for the return we will get (which, let's be honest, is not much improvement in absolute safety), I'd rather teachers spend their time... well, teaching. Lots of lost education to catch up on, after all.
Risk is an aggregate thing, and individuals and families /can/ impact their own overall risk if they want. (Stay home in the evenings; shop online instead of going to the supermarket; wear FFP masks; test before meeting up; etc.) This is not to say schools should do /absolutely/ nothing, but you certainly have to ask why don't people act to protect themselves or their family if it is so important?