Interesting subject ... I think that developing an addiction to pharmaceutical grade nicotine will be more down to a predisposition in your personality than the chemical itself. As with many of us, it can become a behavioural addiction rather than a chemical one. The outcome for you is unpredictable.
It's well known that cigarettes contain additives which enhance the addictive qualities of nicotine. Pharma grade nic in patches, gums and vape juice don't have these enhancers. Even the FDA in the US removed the recommended usage limit on NRT products (was 6 months, now unlimited) in light of evidence which suggested or proved the much less addictive quality of pharma nic. They wouldn't do that unless the evidence was pretty compelling.
It was one interesting outcome from his study that Dr Mosley, who never smoked, did not become addicted to nicotine during his weeks of vaping. In fact he felt no compulsion for more nic, struggled to keep it up and suffered no withdrawals. What he did point out though was that nicotine gave him very little reward for the user in comparison with other drugs. He didn't really see the point of it, for him.
I'd agree with the school of thought that adults should be free to choose what they want to do, given adequate information to make an informed choice. Vaping is not the exclusive domain of ex-smokers and it's a tad hypocritical and self-righteous for vapers to say you shouldn't use nicotine just because you never smoked. If you want to use nicotine, caffeine and/or alcohol that's really up to you.
You need to bear in mind that vaping for the vast majority of us is first and foremost a harm reduction strategy. That we enjoy various aspects of it as a hobby is a secondary consideration. Should a non-smoker take up vaping, with or without nicotine, then there's an exposure to risk that didn't exist before. If you want to partake despite that risk, it's your call. It's not as risky as smoking, downing 4 or 5 pints of beer a day, cycling on London streets or bungee jumping.