My experience is that cables make extremely subtle, nearly inaudible differences. If you buy them because they appeal to you aesthetically, or to feel like you’ve ruled out a weak link, and it makes you happy by all means do it. Why not? But expecting dramatic differences imo is very much overstating what cables can do. Which frankly isn’t much. But thats just my experience. And, I’ve tried expensive cables. Maybe not the insanely expensive ones but I’ve compared in my system a $175 pair of speaker cables to a $375, to a $1200 pair. If there are differences, they are so subtle I can’t reliably tell. And my hearing is fine, and my system is easily “resolving” enough. Cable money imo is far better spent on improving speakers and room acoustics. And imo high end cables are 95% marketing and 5% reality.
Needless to say if you can spend 100k on cables and still have unlimited $ left to throw at speakers or acoustics then my hat is off to you. :)