especially in league,
small mistakes create a downwards spiral.

when you die your enemy can lane freely while you miss out.
making him stronger and you weaker.

that loss also has more impact.
in mobas the diffrence between a kited out and a ill equiped player is far more drastic than in other games like csgo.

the separated laning also makes it easier to pick out a scapegoat.
the lane that lost is easily blamed,
even if the rest of the team did nothing to help them.