Would you trust him any less than you would trust Akers to make that kick? Their success rates are almost identical from 40+.
One of my problems with MM (and with many fans) is that they seem to expect a 40+ yard field goal should be almost as certain as an extra point kick. It's not, for any kicker. A ball shaped like a football is shaped, kicked broadside so it will either float or tumble is not very stable aerodynamically. It will not always fly "true". Over a distance of 40+ yards it will wonder, even without the outside influence of wind. From the center of the field, the kicker has a tolerance of 9'3' on either side of dead center. If the kick comes from the hash mark, the tolerance is less due to the angle. That's not a lot from 40 yards away or more.