Quote RoastBiff in France:
I must add that I don't use a LapTop with my Logic Pro in my music room, and I suppose that plugging a mouse into the LapTop would defeat the portability of it!
There's a mouse in the side pocket of my laptop's bag, and if I'm using it for anything more than web browsing it usually gets plugged in. Portability is a highly overrated feature. You need what you need.
You don't have to write songs. The world doesn't want you to write songs. It would probably prefer it if you didn't. So write songs if you want to. Otherwise, dont. Go fishing instead.