It may be that they think nothing is going on now with everything closed and delaying getting it may result in a more inconvenient timing for them.
Just guessing.
In Maryland they jailed someone for repeatedly throwing such parties.
There is no question. Herd immunity eventually and inevitably will occur. But as it happens, the herd will be painfully culled. There will be much sickness, death, sadness and mourning. This is not a herd of cows.