Wrong. Your job is to win despite the obstacles in front of you. That includes your orangutan teammates who don't understand man advantage and point pushes.
You had several options - 1. use the mic to call your team to go to point. 2. Take another angle, now possible after the space you've created, to get even more picks. 3. Go onto point yourself. People are lemmings, if they see you go even without voice comms, chances are they'll follow. If you get into trouble you still have your grapple. 4. If the enemy is that bad at positioning then chances are you can use a different hero to do the same job with better point presence. So swap off Widow and win the game.