Striping disks with MAXDOP 1

We're working with a vendor who is insisting we use MAXDOP = 1 (I know...). They are also emphasizing the importance of striping our data files across different disks. As I understand it, an I/O operation is always paired with a CPU cycle. So if we have tables that were spread over different disks, wouldn't MAXDOP = 1 make reads/writes occur sequentially rather than in parallel?