he's a nice bull. who cares if he's a carrier. he looks good enough to use and screen offspring.
there's a test, that's what the test is for.
there are more defects coming, in ALL breeds.
use the tests, keep the genetic base wide with the phenotype and pedigree one likes.
narrowing the genetic pool due to fear is stupid.
narrowing the genetic pool due to a certain look is annoying and will eventually box itself in not due to the defect, but the genetic base. they probably will eventually require a certain outcross background to excel with and some people probably already know this.