You are partly right. The use of SMS vs MMS is also in the ballpark 99 to 1, but the number of users of SMS vs MMS is more 1 to 1, allmost everybody use MMS, but not very often. Still it is one of those things you have to have on a phone.
MMS cannot be compared with e-mail. MMS links directly to your phone, no user names, no log ins, no nothing. There is simply nothing more practical than MMS when sending small videos and pictures, and grandparents loves it.
Nokia certainly had the time, especially considering its delayed shipment of the model.