The NHS only allows patches in a very limited way, say one course of a few weeks, and no repeats within six months.
Nowhere will offer free vaping indefinitely. They would offer limited access and lots of behavioural support to stop.
Prevention IS better than cure. If someone stops smoking, their chance of having a heart attack, stroke, and yes, breast cancer is reduced.
That is an overall saving to the NHS.
We are now in such a race to the bottom, that it's a competing victims/patient mentality when prevention is actually cost effective! In other words, if you pay for smoking cessation- you save the NHS money several-fold over as the person does not go on to have the almost inevitable poor health associated with it.
Prevention has gone out the window in the UK, we are just fire-fighting all the time.
Also, smoking is now clustered in groups who are the most disadvantaged in society (people with addictions, people who are poorer, people who have mental health issues- rates are 40%+ in these groups). I'd rather treat their smoking and save money, people who are in psychiatric care die 15/20 years younger than people without psychiatric problems, and smoking is a big part of contributing to this.
You can also vape AND use NRT medication/other stop smoking medications, that seems to produce the best results and I think more evidence will build on this esp in heavily dependent/people with mental health issues who find it very very hard to stop.