[prplhze2000]

Dumb question, I know.

[thurask]

Different launchers have different styles and different feature sets, from the lightweight to the customizable to the batteries included. The default BB Launcher is okay, but putting it on a PKB phone allows for keyboard shortcuts, which is its unique draw (as far as I can tell).

Here's the usual suspects for which launchers are recommended to try out: https://www.androidcentral.com/best-android-launchers

[FishhPoohh]

Dumb question, I know.

Because if you dont use a launcher your phone wont work.

[Dunt Dunt Dunt]

Dumb question, I know.

Why not?

It's like asking why use Windows over DOS.... it's easier.