Is Ramattra's shooting though shields ability really fair?

It’s what makes him dangerous up close during his temporary cooldown. He becomes like a closeup rein who can only block for himself instead of the huge shield. Time limit ability.
In a rein vs rein mirror should reins hammer not go through shields? Does shield block Dooms fist?
Tank close range melee abilities tend to go through shield.
Winston electrify also goes through barriers.
Wrecking ball can smash through barriers.
Most tanks who can’t attack through barriers are decent at taking down or working around barriers.
When Ramattra close enough to punch is swinging at him a better option? Force him into the defense?
As Ramattra I may look like I’m targeting the rein with punches, but I’m really targeting the squishies grouped up right behind him.
There’s no reason for rein to hold shield up against nemesis, but you can force Ram to be a bit more defensive by swinging.