The goal of Ubuntu’s help forum is to solve users’ problems efficiently and effectively. That goal is better achieved if questions are posed in certain optimal ways.
The goal of Lemmy is for people to have discussions (like this one! ;). That goal is not better achieved with well posed questions.
For better or worse the more correct name GNU/Linux did not catch on and is universally shortened to Linux. Android uses the Linux kernel, but is not GNU/Linux, and therefore is not Linux.