It's not about being "disadvantaged". It's about the fact that public services funding is being cut and people are choosing not to go into public services due to the wages, which haven't risen significantly in over a decade. Teachers are part of that.
I have a degree, a PGCE, an MA and a PGDip. 13 years experience. My wages are not rising anywhere near in line with inflation and, at the top of my pay scale on about ÂŁ42k, I cannot earn anymore unless I go into leadership. Since I started teaching I've been lucky if my wage has risen 2%, regardless of inflation, with years of pay freezes.
As such, I'm looking to leave the profession in the next year or two, probably. Yes, I'll lose the holidays just as my DC are starting school, but the thought of being able to progress and earn more, not to mention being able to perhaps work more flexibly, is more of a draw right now.
That's 8 years of training and studying relating to education, and 13 years direct experience, that won't be in teaching anymore. My story is not unique.
Those who don't think teachers should strike clearly aren't bothered that schools are having to choose cheaper, less experienced teachers, and those who do want to teach are leaving to pursue a better wage.
It's not a race to the bottom. All public services are struggling.