

The post is specifically about how you can serve a totally different script than the one you inspect. If you use curl to fetch the script via terminal, the webserver can send a different script to a browser based on the UserAgent.
And whether or not you think someone would be mad to do it, it’s still a widespread practice. The article mentions that piping curl straight to bash is already standard procedure for Proxmox helper scripts. But don’t take anyone’s word for it, check it out:
https://community-scripts.github.io/ProxmoxVE/
It’s also the recommended method for PiHole:

Users are blameless, I find the fault with the developers.
Asking users to pipe curl to bash because it’s easier for the developer is just the developer being lazy, IMO.
Developers wouldn’t get a free pass for taking lazy, insecure shortcuts in programming, I don’t know why they should get a free pass on this.