True, but in my experience having worked for a school district and for a tech college, there is nothing teachers hate more in the entire world than having to revise curriculum. At the tech college, the IT instructors rewrote their curriculum every year out of necessity, but instructors in other areas were just like pretty much all the school district teachers I knew: if a button changed position they were upset because they'd have to revise their instructions that tell kids to click on the 'the third button from the left' or some such nonsense.
At overly busy tech startups where time is money, it's more than just the "hassle", it's time that takes out from doing other work. There must be screenshot automation suites out there, but the education department is often woefully understaffed, under budgeted, and near last on the list of priorities that it is a laborious, toilsome, and thankless task, often without notification to the eduction team, which results in less-than professional presentation when the first time the change is noticed is in the classroom or when a customer complains. It's no wonder that it's upsetting when things are changed!
