I've had both experiences - it depends on their priorities. I have friends who don't blink at buying expensive cars, quilting machines, watches and jewelry but balk at spending more than 100 dollars for something else. I've gotten "WOW! That sounds really good" to "It sounds OK - my Bose stereo sounds pretty good too" to "I just want to listen to music without all the bells and whistles". People who grew up with music as more a part of their lives than just turning on a radio while they worked around the house or in their car are more likely to appreciate a good system. My wife saw many bands in her younger years and will remark how good my system sounds (it's the best I've ever had but not stellar by any account) but my daughter shows absolutely no interest beyond her iPhone and earbuds.
When someone listens to your system for the first time.
I recently had a 30 something friend of mine, I'm 64, stop in for a bit and sit in my listening chair. He is a musician and had never heard my system. Decided to play him Sultans of Swing on my turntable. He was awe struck. Look of amazement on his face. he said he had heard the song countless times, but now knew he had never really heard it. He talked about the clarity, how wonderful the cymbals sounded, how awesome the bass was (thanks to the new subwoofers I bought). I played him a few more things, some Tony Rice, to hear some acoustic instruments. He couldn't get over the soundstage and imaging. He said he knew why I sat in that chair. He said he wants to come back, there are tons of songs he wants to now hear on my system. I listen to music just about every night. I enjoy my system, but sometimes get caught up in listening to the gear, wondering if I should change something. Nature of the hobby. So nice to get a new perspective. Reminder to stop over thinking and enjoy the music.