In general I agree, but KDE Connect is not random software and it's fucking awesome, especially if you are a KDE user, for a lot of reasons. The use-case described in the grandparent is just one of many handy things available via KDE Connect

I use GNOME: the gsconnect extension on my laptop, the kdeconnect app on my mobile devices. They can even share data and files between themselves without going through the laptop, ring another one when I lost it somewhere at home, control the media playing on another device or my laptop.