The advent of low cost optical seekers means that laser homng add on packages for rockets is becoming a viable option. Your average 80mm rocket will cost a few thousand dollars each… often adding a guidance package that will allow it to home in on reflected laser beams or hit a target that is distinct on its own might only increase that cost per rocket by 3-5 times. For max range shooting (which offers the helo the best protection from fire from the target) the increase in accuracy would be huge and the near ballistic range of the rocket could be used instead of the effective range. For the 80mm Soviet unguided rocket depending upon the rocket type max range could be from 2km to 4km. With laser guidance kits fitted that max range could be up to 6km with better accuracy. This means better standoff range performance plus much fewer rockets fired or more targets hit.

For every tank on the battlefield there will be dozens of trucks or light support vehicles that don’t require an ATGMs warhead to defeat. Flying an Mi-28N for example having 16 ATGMs plus two 20 round 80mm Rocket pods means 36 point targets can be hit plus the 300 x 30mm cannon shells. If necessary you can leave the 16 ATGMs at home and carry 80 x 80mm rockets.

When considering launches from a helicopter there are two additional factors that need to be considered. One is rotorwash which can deflect the course of a barrage and also tends to generally increase inaccuracy.

Very true though Soviet helo tactics normally involved attacking targets in a diving attack in forward flight rather than from a hover like western helos.
Experience in Iraq and Afghanistan seems to have led western pilots to do the same as hovering, even behind a tree makes you a sitting duck for ground fire… most of which will not be stopped by a tree.
Equally there might be a tree between your helo and the target but is there a tree beside and behind you too to protect your flanks and rear from small arms fire?