True but also the sheer number of people now trying to use it. Other factors include the difficulty of getting an appointment with the first call GP (once known as the family doctor) and the utter madness of many A&E departments. They do a great job but can't cope. 12-hour waits are not unknown. I see no reason to expect a turnaround with the Labour Government.
It would seem building better systems is not enough. We must strive to maintain, continuously improve, and scale them to meet demand.
Sadly culture in the US is diluted into believing that profit motive is a silver bullet that fixes all problems. And many are raised in religions that teach one to deny critical thinking, embrace appeals to authority, and love confirmation bias.