That is such a ridiculous statement to make. Its literally trolling and not making an argument.
Nobody says this first SLS shouldn't launch. Not that it would matter much if it didn't, but still.
The discussion is about forward looking space policy for the next 10 years, for the whole Artemis program.
SLS will fly LITERALLY 1 and then not again for 2-4 years. In that time a strategy change can and should be made.