"It is by no means clear that comet impact is uniform over time"

<a href="http://web.mit.edu/newsoffice/nr/2003/asteroids.html";. New MIT Asteroid report

"MOON IMPACTS

MIT researchers also calculated the rate at which NEAs collide with the moon to produce craters. Lunar maria -- dark areas that can be seen with the naked eye -- have been accumulating craters from NEA impacts since their formation more than 3 billion years ago.

The rate of crater formation expected from the NEAs matches the observable
counts of craters from the lunar maria. Because current NEA population matches the crater counts from the lunar maria, the NEA population has been roughly in equilibrium for
billions of years. In other words, new asteroids are introduced into near-Earth space at
around the same rate that old NEAs are destroyed by collisions with the planets and the sun or are ejected from the solar system."

I know that this is Asteroids and not comets, but it shows that the long-term flux is well-described and as discussed in the other link I referred to, 99% of the impacts are due to asteroids and other NEO's {including extinct comets, one imagines}, not new long-period comets.

If the flux of long period comets is uneven, then it logically follows that the risk can only be greater than average for a fraction of the time, which diminishes as the rate goes up, so there is no credible risk of a "storm" of comets impacting the Earth on a human timescale.

I must say I've never heard of Cold Duck, but I'll wager you a crate of it, or an equivalent of your choice in 2030.

Don't belittle your life expectancy - you should outlive your parents and have a significant evanescance, waiting for the sky to fall - which it won't!