> However, they have not sucked on them like candy and swallowed the contents 16 hours a day.

Again, maybe not where you are, but there are definitively countries where both adults and children have tabacco under their lip for most of their waking hours, with no spitting or exhalation involved, as they're inside school/offices, can't really just spit there, even the non-synthetic stuff, as that's relatively new.

Zyn is specifically synthetic isn't it? You still seem to be mostly focused on synthetic nicotine, but the same behavior been observed for many, many decades with non-synthetics too.