I am coming from Windows and there it’s better to uninstall an unused App. Because a security issue in an unused app can cause trouble and harm your Computer! (e.g. Adobe Flash or the Java Runtime)
I just guess it is the same here. And for that reason I always update my Apps. But I’m not interested in updating Apps I don’t need. Less is more in this case…
Disabling the Apps would be better than nothing. But even this is not possible in /e/OS… Is there a reason?