Its about inflation and whether fixed block mining rewards are better than vanishing rewards.
I hodl a lot of DOGE
I think that
1x
2x 100% inflation
3x 50% inflation
4x 33% inflation
5x 25% inflation
...
50x
51x 2% inflation
...
101x 1% inflation
in the case of Doge
You seem to be confused with Grin, which has a fixed reward from launch and therefore 1/n inflation after n years.
Doge had MUCH bigger rewards in the first year (emitting 100B DOGE, vs only 5B DOGE for every later year).
Curiously, 1 DOGE costs about the same as 1 Grin, even though the former emits at a 167x higher rate...