"Vunerable" is such a big word.
Vulnerable to Covid.
Vulnerable to just about any illness.
Not vulnerable to Covid but vulnerable to the effects of virus control methods, social isolation, lack of education, loss of income, abuse.
There are people/ children who are vulnerable and being harmed now and everything was OK for them a few months ago.
It's the cost-benefit analysis and there are more people being harmed by Covid management than the benefits to them of being protected from it.
If you are shielding a medically vulnerable child, then the cost-benefit is worthwhile to you. For the majority of the population, that is not the case. For some older or very vulnerable people, they still might feel that with the odds stacked so far against them that it's not worth the costs of wasting life while the going is OKish.
But maintaining the country in suspended animation doesn't solve vulnerability issues and creates other forms of vulerability to others, and longer term, compromised health and education services will not assist your position anyway.
But at what point is your "normality" resumed?