ChrisMayLA6, You'll be less than shocked to discover that research indicates support for striking nurses & doctors in the NHS is more likely among 'nonconservative voters, individuals leaning towards left-wing politics & those with greater trust in the NHS'!
Its likely that the Tories have calculated playing hardball on the strikes would (does) play well (better) with their supporters & is politically a low risk strategy.
The Q. is will an election change things?