There's generally very little reason to escalate any kind of software installation that you do outside of your package manager all the way to root. The example given in the instructions even uses a user-specific directory (
~/.local/bin). Virus or not, it's best to be careful. Another point of concern would be the jeetification of the installer you're downloading, but it's inapplicable in this case because it's a single file download.
Here's a decade old example of what I mean, from a company I happen to enjoy ayylawging: