1. I don't like surprise breakages. I am not prepared to fix a service my family uses midday on a Tuesday when I am working since it auto updated. I'd like to specifically make sure I have dedicated time and plan if something is going to go wrong.
2. My family HATES when things change. I try to run LTS versions of things, but annoyingly, some software like nextcloud doesn't have LTS version. One of the things my family likes the most, is that the stuff I host isn't constantly changing like commercial products. Having google photos change or netflix have a new interface randomly is very, very frustrating for them.
Since my homelab is completely internal, I avoid quickly doing updates (unless it is a critical security issue), and definitely avoid doing major version upgrades unless there is good value in it.