Many Hi-Fi magazine reviewers and store salesmen can't hear differences in gear that are readily heard by the guys who travel around to manufacturers and distributors trying to sell advertising in said magazines, and the girls who work in the offices of the hi-fi stores. (Experience, not conjecture.)
I've listened to tons of cables. They all sound different. Most of the ones with exotic materials and/or construction sound worse than ones that are nothing special. (The commonly found 200+ strand 12 gauge speaker cable sounds worse than 56 strand 12 gauge zip cord.
One may indeed be foolish to buy expensive speakers. The better the speaker, the more it reveals the musical inadequacies of the gear that's driving it. Get the CD (or record) player that you think gives the best performance that you can afford, then select the rest of the system based on their performance with the selected source.