"Paying for a tiny dose of luxury doesn’t make me an irresponsible millennial." No, but dropping 10% of your salary a year, every year, on coffee certainly does.
I'll say this...if spending $7 a day on her little bit of heaven is what makes her happy, then go for it.....its a cheap heaven when you think about it...
I don't drink coffee at all so luckily I don't have to spend at Starbucks....