Why don't these idol games represent reality of being an idol better? Losing your freedom, pleasing old men to get famous etc.
It's just all about taking fluffy photos of girls.
That's what doujins are for.
Also, Uzuki is literally pure and wouldn't do stuff like that
They're selling the dream.
Same reason RPGs don't deal with you getting blisters and callouses from walking miles on end, infected cuts, freezing your arse off in the pouring rain when you've nowt but a bivvy bag and keeping your weapons clean.