Grandjura hospital doctors are not striking because they don't want to do nights and weekends. And GPs are not involved in the current dispute.
But yes - the NHS in England is under a sustained attack, on several fronts, from the Tory government. Attacking the hardworking hospital doctors, introducing full student fees for student nurses who are expected to do a significant amount of nursing, and privatising chunks of it are just the headlines.
Some things - like staff shortages - may look like bad luck, or incompetence. Maybe - or maybe not. They lie and present their policies as helpful when they are counterproductive e.g. saying today that by making nurses pay for their own training there will be more money available to train more nurses. Give me a break.
Health spending is devolved in Wales - a lump of money is given to the Welsh government to spend on education, health and other public services as they decide.
Scotland and Wales are given more money because they have long been economically deprived and suffer from geographical problems that England in the main does not. There is a lot of history behind this, and the deprivation and poverty in Wales and Scotland is the result of this history. Just as the greater affluence of England is a result of history. And of course immigration is also a product of history.
Immigrants these days tend to prefer to settle where there are jobs, or where it is favourable to start a business, not in jobless backwaters where well-educated locals struggle to find work.
Statistics show that on balance they make a contribution to the economy rather than being a drain.