I thought the point of making them like this was that they technically are reusable, so they can sell them (to people who for some reason keep buying them and throwing them away!) in places where disposable vapes are banned.
I vaped for around 8 years, about 4 years with typical flavorings and the last 4 years unflavored. IME unflavored vaping really isn't that bad, I accidentally switched to it because I ran out of flavoring one time and after a few days I didn't really miss them anymore so I just stopped using them.
I would compare it to people who drink soda all day, they can't fathom how people can drink "boring" plain water all day and they have a really hard time switching, but people who are used to drinking water find it as refreshing and satisfying as anything.
I think these flavorings cause more harm by luring young people to start vaping than they help smokers by luring them away from cigarettes. In an ideal world adults would be allowed to vape whatever they want, and teens wouldn't be able to get their hands on vapes in any capacity, but clearly that's not working so I think that flavor bans are a decent compromise.
I don't buy the argument that flavor bans will make teens go back to smoking. Cigarettes taste awful, they make you smell terrible, they irritate your lungs far more, they're far more expensive. If I was a teen I would still pick up unflavored vaping over cigarette smoking any time, but I'd be less likely to get into vaping without the flavorings.