Agreed. And I'd like to add to this...
Using a dumbbell doesn't necessarily guarantee safety. Dumbbells are not inherently more safe than barbells when used appropriately and intelligently -- i.e. you need to match the exercise to the individual's biomechanics in addition to their movement capabilities/limitations.
In the case of an upper body pressing movement, there are many factors to consider when deciding what implement to use and how to use it appropriately.
(1) Does the exercise put you in a mechanically advantageous position? Or does it encourage a position that increases the stress on the tendons, ligaments, and joint capsules?
In the case of the press we can ask: Are the pectoral muscles in an efficient line of pull? How can the exercise be adjusted to maximize the work of the pectorals? Check out the video below for an idea of what I'm talking about...
(2) Are the intrinsic muscles of the shoulder adequately prepared to handle the increased stability demands of a dumbbell press versus a barbell press?
The shoulder has to work harder to stabilize the load in a dumbbell press. When you're using a light to moderate load, this is a great way to train shoulder stability (<--- in this case, the dumbbell press wins). But as you go heavier, the demand on the shoulder may be too great for an athlete who is not adequately prepared.
(3) As @kingbrady alluded to, does it contribute to increased throwing performance?
The chest is an internal rotator and horizontal adductor of of the shoulder joint so, yeah, it probably does. I'm not aware of any empircal evidence supporting this so I will reserve my judgement. Plus, the chest can be trained in a variety of ways and there is no evidence to suggest that one method confers benefits to throwin velocity over other methods.
(4) Does it feel good? Or does it feel wrong?
Probably most important! If something feels wrong, don't do it.