Why 'Sutorippu'? Katakana is so uneducated and simple, and there are words in Japanese like "nugu" and "datsui" and...

Yes, yes, I'm aware. However, for starters, like many words in the Japanese language, "nugu" has various meanings, such as to leave a group, and second, "sutorippu" seems to get the point across a lot more easily. Given the context of the site, what else could it mean?