Yes, if I knew I could stop before running into him, and if so cleared to do.
That is the problem? If he has braked hard in a similar performance jet to make a turnoff and hasn't cleared you could have a brake or reverse thrust deployment fault and not stop.
There are many reasons why a jet you think is clearing ends up not clearing.
myself until his nose is in the taxiway and i can see he is moving out I wouldn't take anything for granted
I even had one who was asked to expedite and with the slant angle looked level with the turnoff and able to make a direct entry to the taxiway who infact was slightly past it and immediately executed a 180. It all looked good to me and i am sure to ATC too
One taking off isn't such a problem as its moving away from you and after reaching V1 he is going airborne regardless