I agree a lot with the sentiments here and I think people who want to avoid being filmed should have that right. But, as someone who doesn't mind (and is younger) I suppose I could share my rationalizion for it (as flawed as it may be)
One often mentioned reason is the fear that in some way your likeness will end up in something significant, or viral. That makes sense, it's the most invasive and significant violation. We "risk becoming the side character in someone else's parasocial relationship" as another commentator mentioned. I myself wouldn't want that either, but I derive some comfort from one main observation: virality doesn't scale. A lot of the worries come from the fact that "everyone is filming now", "everything is shared now". That's true, but the likelihood of any of this ever becoming popular or even seen goes down as the volume goes up. That alone is enough for me to not be that worried, at least not by the increased prevalence of public filming/photography.
On the other hand, this does nothing to limit the effect of data harvesting and government espionage, a real worry I might have.
It's interesting that you mentioned being younger. One thing I've noticed is that as people accumulate different experiences and social groups (not necessarily just because of age), they often develop different "personas" depending on the environment. In one setting, you might be an enthusiast sharing a video about a hobby, while in another you might be a CEO interacting with your team, shareholders, partners, or customers where you naturally behave differently. The challenge is managing these "many worlds" without them colliding. One solution that's becoming more feasible now is the ability to modify your appearance and voice depending on the context.
One often mentioned reason is the fear that in some way your likeness will end up in something significant, or viral. That makes sense, it's the most invasive and significant violation. We "risk becoming the side character in someone else's parasocial relationship" as another commentator mentioned. I myself wouldn't want that either, but I derive some comfort from one main observation: virality doesn't scale. A lot of the worries come from the fact that "everyone is filming now", "everything is shared now". That's true, but the likelihood of any of this ever becoming popular or even seen goes down as the volume goes up. That alone is enough for me to not be that worried, at least not by the increased prevalence of public filming/photography.
On the other hand, this does nothing to limit the effect of data harvesting and government espionage, a real worry I might have.