Understandable to be concerned if a roster is seamingly full, team seems set, positions filled, and coach decides to bring a player out to take a look.
That said,
How about this perspective...
If the goal is to win.
And talent shows up to help that goal...
Isnt that a good thing?!
When opportunity knocks on the door...
it may be worth the time to atleast greet it with hospitality!
Well there is this thing called team chemistry. The sum of the whole is greater than the individuals. Granted you do need ability. But here you have gone through months of practice, bonded with teammates and fought with them to win , only to be replaced because the new player had ++abilities. Who's next?
No thanks.