There are plenty of other factors in determining concern including one's individual risk factors. But there's also a difference between concern and fear. Unfortunately I've seen people who are vaccinated express fear and reluctance to participate in normal activities with other vaccinated individuals due to the Delta variant. If we're looking for zero risk from Covid, we won't be finding it for years.
I would advise people to get vaccinated, as that's the best protection against all strains of COVID and the best chance for the pandemic to be brought to an end.
I'm not sure why you seem so insistent that I should be fearing the Delta variant, but if you're convinced that you should, then by all means.