may actually be useful if your IFV cannon gets broken and you need the blocks from fix it
besides i dont understand how it can be annoying

it can be annoying cus it gets in ur inventory it prevents u from potting

The point is to drop the items so that it is a free for all to get the mats. Also, that is another intended purpose, because it adds another aspect of chaos to the chaos of sieges.

free way to get mats? like i need sand in my inv lol whats the point

Why u got sand in ur tank o-O