You can change it of course! I have no idea why that one is the default.
If you want to keep greetd, tuigreet is nice and simple:
To more directly answer your question: no problem to just uninstall it. I typically do the same with greetd, it really provides very little benefit.
sudo pacman -R greetd greetd-qtgreet
Once you get rid of it, getty will take over and you can just log in from there. If you’d like, you can set it up so it defaults to having your username entered (so you only need to type in your password):
Thanks for the excellent info!! I will checkout out tuigreet, just to see what it is like. But I will almost certainly uninstall greetd as I really have no use for it.
And thanks for the Arch Wiki link on getty – I didn’t know I could configure with username entered.