The curse which is a boon/blessing

One day when Valmiki was bathing at Tamasa river he saw 2 krauncha birds(crane) sitting, a hunter hit one of the bird the other was circling around the dead bird, struck with grief he cursed the hunter the above sloka which says "OH hunter because you killed the Krauncha bird you will not live for long" He returned to ashram and was confused with the curse he gave and lost in thoughts, then lord Brahama came and said "The curse u gave is the ramayana you must start writing Sriramayanam" He then understood the curse he gave which is: "The one born from the lotus which blooms from mud, kill the lustfull ravan and rule the earth forever with Sita" The curse which is a boon/blessing. P.S: I cannot explain properly cause I cannot find words/Grammer in englis to exactly explain the interpretation I heard which is in telugu🙏🙏🙏