Hanzo having tree trunk arrow is just something people coping on. It has always been on the smaller end of projectiles.
Also IIRC OP, you’ve called sombra’s vrius, a 0.5 meter radius projectile, as skillshot. Even Hanzo’s arrow at the largest state during the first week of season 9 was 0.2 meter, was still 2.5x smaller than virus.
Pretty ironic someone calls hanzo’s arrow tree trunk while calling sombra’s virus a skillshot. If Hanzo’s arrow is tree trunk, what is virus then? A train or a truck?