When calculating the two endpoints along the end line where a shot
could be legal, one matches the endpoint closest to the corner with the ball hitting the flange, and the endpoint furthest from the corner with the ball hitting the front of the rim.
My math shows that the endpoint furthest from the corner is
about 165" from the corner. This is 13' 9" from the corner, or 11' 3" from the midpoint of the end line. This is 15" further from the corner than the midpoint of the top/bottom half of the end line. It is also 8' 3" outside the edge of the backboard. It is also 5' 3" outside the key.
Does any of that change your opinion of the shot?
