This feels like an overreaction. There should be well thought-out plans, but practice goalies are going to deplete the minor leagues.
Sure, what happens if a second EBUG is needed is a valid question. What happens if the EBUG playing gets injured? It can go on and on. At some point, you just can't play anymore, and that needs to be considered.
I feel like goalies would graduate to the position. Like an honorary thing. Something you retire into after a career in the minors. Most guys would probably prefer that, considering they wouldn't be rich or anything. I'm guessing you could hold that kind of position until you're, what? 50?