They aren't, but they did answer. And their answer doesn't make sense. CDPR users are under no obligation not to question such answers as not making sense.
Budget can be wasted and result can go bust. Weren't there big budget failures in the past? As I said, professionalism is not measured by the amount of money, it's measured by well, professionalism, nothing else. Since we can't evaluate CDPR efforts towards cross platform support, we can only evaluate their answers about it. And the answer did not sound serious to me. See the reasoning why, all was explained above. As I said, in this case it's hard to say whether it's the problem with the answer itself, or with the lack of CDPR's expertise in making Linux ports for example.