Depends on the Junkrat.
I know for a fact i can make that tire scary, especially because i tend to flank with it… not myself, with the tire.
Playing Junk is about confusing the enemy.
You have to poke them from as many places as possible, and tear through shields as you do.
Bastion is in constant danger as long as you’re trying to get something done.
Junk can poke or bust shields from a safe place, or even a choke point.
Junkrat can delete squishy heroes if you have decent close range aim and reaction times, and Bastion still stands little chance even in Sentry.
You’ve gotta use mines carefully.
I don’t often use them for mobility unless it’s a quick getaway or a frantic move.
I often have traps set up so i don’t even want to reset it’s placement…
As well as keeping it for the CC advantage in team fights.
Throw that thing over a shield tank and send them flying towards your own team… some of the most satisfying kills come from random junk mines.