Quick didn't have much room. If this was any other profession that didn't have to maintain some level of neutrality ("no cheering on Press Row!"), something like this could've been said:
"Dear All, I deleted a tweet that I wrote and posted in a moment of frustration and, while dumb, does not reflect how I feel about the team, its players in general or CJ McCollum in specific.
To CJ, my sincere apologies. It was an unprofessional rant-of-the-moment hawt take and I quickly recognized the error of it, but not quickly enough to prevent it from being screen-capped and saved for posterity. Won't happen again."
But how do you write that without looking really unprofessional? And if you don't, how (as discussed above) do you get quotes, "inside info", rumors, players' takes, etc. from a locker room that's going to freeze you out? You become Canzano, pot-shotting from the bleachers b/c no one's going to give you the time of day.