For his age demographic, it is actually 99.96%.
3050 is up from 2727 on July 24th. That is 323 deaths.
Cases from that time (7/24) were 6213592, and now are 6891110. That is 677,518 new cases since that date. That is 323/677,518, or 0.00047674010137, or .047% This would be a period representative of the Delta impact, meaning Delta has had a mortality impact in the 18-29 demo of .003% increase, at least observed over this month.
It is data, of a wide stretch of population, with no real controls, over a more or less arbitrary time frame (just when I have happened to check the statistics and written the math down.) There's about a bazillion confounding or conflating things that have happened since then that one might point to for this or that reason for any given datum. Start controlling for race and it gets more interesting.
In any case, everyone should probably not take my word for it (or anything) and look at all of it themselves to see which numbers are relevant to them. If I am 23 with lupus, asthma, or an incredibly fat-ass filled with diabeetus, I would get vaxxed, probably.
In any case, it seems rather strange to group in people with a 1/6 chance of biting the dust (85+ people. 2% of the population, 2.1% of the cases, and 30.5% of the deaths) with this age demographic at all.