I always find that suspicious, yes. Not to be AI though — sites have been suggesting this for decades — but I feel like it speaks to the credibility and experience of the people behind the site. Even if AI wrote it, why is the human publishing it.

Everyone should know you should not run someone else's script unless you understand it yourself, or can at least determine that there's no malicious stuff happening in it. This should be common knowledge. And don't copy paste command lines into terminal unless you know what it does.

Did we forget this in the *nix community?

Yeah, pipe-to-bash is a bad habit even when the script is ours. Prefer git clone / AppImage / read install.sh first; the /tmp step is so you can open it before it runs, not so you skip reading it.