I would normally agree with you about the raster v.s vector when it comes to normal proportional icons or shapes. But when it comes to hand drawn icons if you w

I would normally agree with you about the raster v.s vector when it comes to normal proportional icons or shapes. But when it comes to hand drawn icons if you want to reproduce the hand drawn authenticity and fidelity you usually don't use the vector format. It is like saving photos in vector format. "This is trivial." - Actually is harder than you think, few mounts of work, drawing and redrawing, sorting, organizing, web site preparation etc.. Drawing just one icon can sometimes take few hours and trust me the drawing is the easiest part.