Yeah how it affects your experience will be up to you and how you personally enjoy concerts.
Like if you're the quiet type, lightstick gives you something to do with your hands.
I bought lighstick with the first 2 kpop concerts I've attended then the rest I didn't.
First 2 concerts I was afraid of looking like a bad fan for not having a lightstick but after I realize most dont have it either, I stopped bringing it. I just didn't want to lug it around and it also made recording harder but to each their own.
i don't think i'd be the quite type
probably i'l scream my ass off
but yeah. altho i'll have a family member to help me record so