When you play Mercy (or any hero), you should use and abuse every single ability available to you in order to win a game, not because it makes you cool.
I mean…
Do you complain to Hanzos that they threw dragon into grav and got ez kills compared to them skillfully using solo dragons and wiping the team without help?
It’s not luck if they are purpously aiming at you XD. If they weren’t aiming at you and killed you, now that would be luck.