I have an ICOM M3240 and it takes less button punches to make a DSC station to station call than a cell phone does. To enter a number into memory on your cell phone is a whole bunch of button clicks to store it into memory, almost exactly like your radio. Not a lot of difference.
I know a bunch of people that have flip phones and won't give them up for a modern cell phone because the modern ones are too complicated. I am reading a lot of comparables here.
To use the red covered emergency button properly you should punch a few choice buttons as well to tell everyone out there in radio land what your emergency is. You are ALSO supposed to follow up the red button push with a verbal MAYDAY on 16 as per normal.
DSC is technologically farther ahead than your cell phone in some respects (I know, you didn't want to hear that) in the way it can send a call to help to every DSC equipped boat in it's radio range, tell them what your emergency is and where you are. The alarm GETS there attention and then they listen on 16 to your voice follow-up of the emergency. It alarms them even if they are on a different channel, even if they aren't paying attention, even if their radio is turned down, even if they are down below grabbing a coffee.
Your DSC can tell you how many other DSC radios are in range and turned on to hear your call. It can shout out to your buddies and tell you where they are without them lifting a finger (provided their radio is set to auto respond). Or tell them where you are. With AIS your DSC radio can call another boat shown on your screen with the push of a couple buttons. With DSC you can do a radio function test without pestering anyone and without CGR reaming you out for misusing 16.
Reading this thread makes me realize a few of you need to spend a bit of time in front of your radio with your nose in the manual. It's real easy gang! You push a few buttons and twist a knob. It makes it real easy if the radio is mounted somewhere that you can see and access the faceplate.
"I can't find my buddies MMSI." So how did you get their cell number? Cell numbers aren't in the phonebook. Somewhere one of you had to tell the other what your number is and had to punch it into the cellphone. Sound pretty equal there.
Any vessels that send an AIS signal is sending you their MMSI. Your buddies all should share. CG publications should have MMSI's for all bridges, locks and the like.
OR you can look up MMSI's (unlike a cellphone number) by going to...
https://www.itu.int/en/ITU-R/terrestrial/mars/Pages/default.aspx
In Canada ...
https://sd.ic.gc.ca/pls/engdoc_anon/mmsi_search.Ship
https://sms-sgs.ic.gc.ca/eic/site/sms-sgs-prod.nsf/eng/h_00024.html