Does guide recommend untrustworthy PPA?

Hi, I'm looking to install Python 3.8 on an older Ubuntu and I've noticed that a lot of guides are recommending the use of the deadsnakes PPA to do so on Ubuntu. Yours does, on line 23, here: https://github.com/realpython/python-guide/blob/master/docs/starting/install3/linux.rst#L23

This feels...unsafe? Maybe I'm paranoid, but the PPA seems to be maintained by three individuals, and in the PPA's description, it says:

there's no guarantee of timely updates in case of security problems or other issues. If you want to use them in a security-or-otherwise-critical environment (say, on a production server), you do so at your own risk.

Seems like there should be a warning in the guide, at the minimum, or that the guide should recommend installation from source (though it comes with its own problem: timely updates).

Beginne mit docs/starting/install3/linux.rst in Zeile 23 und überprüfe die umgebenden Installationshinweise. Beurteile, ob der deadsnakes PPA einen Sicherheitshinweis oder eine andere Empfehlung benötigt, aktualisiere anschließend den Leitfaden mit den vereinbarten Hinweisen und überprüfe die gerenderte Dokumentation.