Pretty common for those who've never previously left academia. They're used to canteens at school, and at Uni, so (like other aspects of life), they've just never encountered "the real world" and dealing with real life such as advance planning your own lunch.
I can relate to that having retired last year after 40+ years in academia. But as a minion, I could always fend for myself. Uni campuses tend to have everything one needs to never need to leave. We had (well, it still has!) 15 coffee bars, one large refectory, one complex of posh eateries that could be booked for equally posh meeting, shops, postal services, laundry services and a catering service that will bring food to you / your meeting for official purposes. Lots of on-site accommodation too. In olden days we even had a senior eatery where tech staff were not allowed! Decades back we even had an on-site travel agent where staff had an on-demand counter and could simply say 'I want to go to x' and tickets would be provided. Companies can even be set up within the uni framework such that academics have access to office space, phone and Internet, and admin provision, with the uni being company secretary so HMRC and Companies House are sorted for you.