When you use nightly, you're using an unstable application that is likely to have many bugs that cause freezing or crashing. Reading the changelogs is a necessity when using unstable software. Using nightly builds of any application requires additional care on the part of the user.
Just because it requires it doesn't mean most will follow it. Voting requires being informed, most people aren't. Driving cars requires paying attention, many people are on their phones while driving.
The manufacturer isn't responsible for people being on their phones tho. What should they do? They can just warn you, and notice you about best practices.
Yes, I read the manual of everything I use. I have read every law book back to front, know it by heart and will never ever unknowingly commit any crimes. The car I drive, I know how to repair, no mechanic needed, I write all my software because I've read every guide known to man, I am in fact the perfect human being with no flaws and am up to date on every rule there is.