Morse code (a.k.a. continuous wave/CW) is really great for low power operating (QRP) and a signal can break through a lot more than voice (SSB) can. CW only radios can also be tiny and are valued by hams who enjoy portable operating and there are programs/events that promote just that. It can also be a lower cost way to get into a potentially expensive hobby. Also, it's just fun to copy the code sometimes.