Why does Mirny 13 punishes you so much for sniping?

Since going alone is a death sentence you might think it's a good idea to just snipe from a relatively safe position but it's not. Because doing so, it then become a pain in the ass to collect mirium as it doesn't automatically go in your tank. You have to actively get glose the the tanks you have destroyed to collect the mirium.

Why is it a pain? Because most of the time you have the Immortal right in your ass so going back to get the mirium more often than not puts you in danger.

This is especially true with a slow tank like Cerberus.

It's even worse on the final boss fight. You might need to use mirium to shield yourself from hedgehogs but then if you want to refill your mirium you have to use your booster because if not you want collect all the mirium before the round ends, and the mirium disappears.

And yes I know, playing together is the strat but it's BS that playing safe isn't rewarding.