It is a tough one, because anyone my age will remember the cigarettes of the 90s came in colourful packs, were sociably acceptable and affordable to teenagers. Unfortunately that is when many people got hooked. It is a much more recent that smoking is banned indoors, pared back packaging and prohibitive prices.
I agree with making it as unappetising for new starters as possible. Unfortunately, there has been far too slow a response to vapes, nicotine pouches and other non taxed nicotine products. Even the flavours of these scream a product for children. These need to be made too expensive for young people to start and in some cases banned altogether.
I say this as an ex smoker who does not vape. I got addicted at 12 in the 90s and the age to buy was 16, you could buy affordable 10 packs for under £2, shops rarely IDed you, the packs looked nice and smoking was everywhere. That generation of smokers are the ones that will be taking the tax hit most-the addiction is well established with probably some of the strongest positive psychological associations with it. You used to get vouchers in cigarettes to exchange for gifts (Focus points, anyone remember those?!)
Also, stop smoking services are not quite as easy to access as you might think. There also often needs to be multiple quit attempts before one actually sticks. I haven't used a stop smoking service this time and self funded the lozenges, which are what work for me.
As many pps have said, criminalising it will simply drive it on the black market where it is completed untaxed and unregulated. Someone mentioned methadone as a comparator-the difficulty with making it controlled/ prescription only is you can't get a smoker to attend multiple times a day to get their cigarette like some methadone prescriptions are administered-and if you provide packs at a time, people will inevitably sell them.
Its one of those issues that is really impossible to address as a blanket problem. I think the current approach of pricing smokers out of the habit (but should run concurrently with vapes) is really the only viable option.
I hate smoking now, the smell is vile and I cannot believe I allowed myself to smell like that, the stupidity of damaging my health and the amount of money I have wasted. I wouldn't be quick to judge people who still smoke though, its a horrible, clingy and over powering addiction that can only really be overcome by individual choice.