By all means, I like notation!
No worries to that!
I'm just saying that all products and software, even if some crossfade with some others, are made for specific reasons. Yes, word can draw, but it's no photoshop. Yes Cubase can make scores but it's no Sibelius, yes ... etc...
With sequencers you can use audio, first of all. You can have plenty of inserts and plug-ins, in each track, you can mix in audio, you can... etc...