Hi-fi amplification is a process of limiting factors. If any single component in the signal path muddles up the sound, no other component is going to come along and put the sound back together. It could very well be the case that, because of your specific system and space, alarm cable is sufficient. For some on this forum, this is not the case.
I personally stuck with lamp wire for a long time and upgraded only after A/B'ing some raw cable designed for speaker use. This was not expensive cable by any measure, but there was an improvement. This was a 4$/foot cable between a Tektron Evo amp and a pair of Klipsch Heresy's.
I think your original post had an air of nihilism about it - something that reads like - it can never be as good as live, so why bother climbing the ladder. I think most of the folks here either willing to take the incremental improvements as wins, or maybe just enjoy the climb. Either way I have never encountered anyone here who wouldn't subscribe to an 'its all about the music' slogan.
My only recommendation to you would be to keep an open mind if you choose to continue improving your home system. You don't need to spend thousands on speaker cable to keep up with the Jonses, but you shouldn't dismiss the experience of others when trying to identify and improve the choke-points in your personal system. On the other hand, if you're satisfied, then sit back and enjoy what you've got. I would be afraid to accidently hook the speakers up to my alarm system - but I'm kind of stupid sometimes.