Straws are the answer to drinking through a lid, which is the real necessity for takeout restaurants. Costco figured this out with a self-sealing flap on the lid you can sip from.
That said, it's all window dressing. As a kid I drank from paper cups with plastic straws. An iced coffee from some restaurants is now a massive plastic cup with a paper straw.
But aside from the pun, we're talking about Starbucks. That is supposed to be a coffee/espresso business. You should be able to drink those without a straw. The fact that espresso milkshakes are so overwhelmingly popular that people require straws from Starbucks in America really isn't a straw man argument, it is entirely relevant. If people weren't buying milkshakes from an espresso stand, they wouldn't need straws. I certainly don't need a straw for any variety of normal espresso. The fact that daily caffeinated milkshakes are normalized in America is very likely linked with our obesity crisis.
They also require plastic see-through containers so that people can visually see the layers on their milkshake.
We'd be doing better if that didn't exit or was considered much more niche rather than entirely mainstream.
For this demographic, paper straws are a significant issue: https://www.npr.org/sections/thesalt/2018/07/11/627773979/wh...
Also, some people drink coffee, tea, acidic, and/or sugary drinks from straws for dental cosmetic or health reasons.
Finally, disability or convenience reasons.
Maybe we all just need to start bringing a titanium folding sporf and a metal straw with us wherever we go and do away entirely with some single use plastics and their substandard, compostable imposters.
It's also much easier to drink on the go without spilling.
I didn't realise that in other countries they still have staffing where you can order. But I bet that will be changed soon too. They recently rebuilt all the restaurants here to make this change.
The good thing is that they have table service now though.
But I didn't realise I could ask at the desk to modify my order once it's placed. Thanks!