Well installing a different ROM isn't the same as removing the OS, which is what the original post said.
And since ROMs have to be built for the specific phone, this only works if someone has done this for the Vivo Y53 (the device the OP was posting about).
And the apps you've posted about are specific to particular phones, so not applicable to the original post. I suspect you are making a general comment about ROMs. But you know, there's no need to remove a launcher: use a different one, and the phone will simply stop loading the built-in one after a while. I know because I spent 7 years with rooted devices, often hacking ROMs rather than simply installing what I was given, and in the early days, with 2010-level phones, was very much paying attention to whether it would be using resources in the background (because the devices didn't have any resources to waste), and I can see right now on my phone that Nova Launcher is using resources and the Pixel Launcher isn't.