I mean... sure. There's always cheaper options. I bring a thermos of coffee i make at home before work and drink that in the morning. If I get starbucks it's on a lunchbreak at work where I can place an order on my phone, drive two minutes to it, go straight in and grab drink without interacting with anyone, and go back to work.
Yes, I can make a Frappuccino at home that'll be a quarter of the cost I only need to drive the 30 minute commute, pull out a blender, hand scoop some ice cream, brew some cheap coffee, prepare it and package it, clean up after myself, drive back 30 minutes to work and then enjoy it... oh wait I just wasted an hour and a half of my work day making my own. One day I'll be retired and enjoy all of the handmade milkshakes I desire. Until then convenience is the name of the game.