If the NHS did more to prevent illnesses then they would not have to work as hard to treat them. If the NHS spent most of their time and effort to prevent illnesses and obesity then they wouldn't need to treat them. If the NHS made medicines or fitness training excercises then they would have less people to treat. This would mean the NHS spend less money and time on patients as well as preventing many illnesses across the UK. If the NHS dont want to be under so much stress, they could prevent the occourance of illness so they spend less money on treatment. For example: if the NHS found a cure for the corona virus how much easier would things be? But if they taught exersise classes then there could be less obesity and weight problems and the NHS would be under less stress. By doing this, they wouldn't have to tackle more diseases if they had a cure. This would be a very effective way to let the NHS be under less pressure as well as feeling more proud. The NHS would have som much less stress and if they found a cure, it would give them more time to plan for the future of the NHS as well as improving it. They could then sort out their issues with funding and money and make better and more deep-thought desiscions. At the moment the NHS have so much weight on their backs that doing this would lift the weight. This is a very effective to improve the NHS.
The NHS are under so much stress at the moment that they shouldn't have to try something new. The NHS would use up even more of their precious time to do this than it would be effective. Doctors and nurses around the word battle everyday to find cures to illness and most still havent. The point that needs to come across is that it is very unlikely for them to find cures so they would just end up buying more equipment and wasting more time to do this. They would end up wasting thousands if not millions of their money on doing this. As said earlier, it is so unlikely the will find a cure to a disease that they may-as-well not try. They are simply trying an impossible task that will just waste more of their money. They NHS already have multiple routines and are used to just attending patients. They would then have to unemploy many workers or employ many new ones to make this change which would just waste too much effort. The NHS will not be able to make this change or will have to do it over many decades. Some patients will also not like this change because they will not get as much attention as they normally would because the NHS would be concentrating on the more 'important' things. This is simply an impossible task that the NHS cannot perform.
In conclusion, It is a good idea to try find cure rather than just treat patients but as explained in the 'no' section would be quite impossible. Instead the could still focus mainly on their patients, but at the same time try and find a cure. They could do this over multiple years and eventually help the country very much. This is a good idea, but would be quite hard for the NHS to perform.