It's sad because it basically gives a huge drawback to picking a copyleft license that has little to do with the actual contents of the license but mostly with market share of the license.
(I won't start discussing the merits of copyleft itself, if that's what your "why do you care?" question was aiming at.)
(I won't start discussing the merits of copyleft itself, if that's what your "why do you care?" question was aiming at.)