Hardier than goldfish from my experience. I've lost more goldies than cichlids.
I jumped into Malawi cichlid when 1st in the hobby. I had too many incompatible species in one tank. Lost one fish to aggression but for the most part they faired well. The weren't ever sick and when injured Melafix helped them bounce back fast. Those fish survived my learning to keep Malawis.
I have had over 20
betta since getting in the hobby...lost most of them for one reason or another. Betta are the opposite of hardy lol. I have lost 11-12 due to MY learning about
QT and disinfecting tanks. Don't feel bad, unfortunately it's part of the hobby. Fish die due to mistakes that you don't even know you are doing.