The reason the bard doesn't resonate in D&D worlds is that powerful Bard archetypes exist in societies that are pre-literate or just becoming literate. The idea of knowledge and magical power being stored in song or verse is compelling when that's essentially the only means of knowledge storage most people have access to. If reading were rare in the standard D&D world, the bard would be a more compelling type of character. As it is, they try to make the bard archetype fit by combining it with a smattering of urban literate skills like Decipher Script or feats like Martial Weapon Proficiency (Rapier) that sort of alude to the high medieval troubador and sort of don't.
The original Merlin, Taliesin, was a bard but, as society became more literate between the 9th and 13th centuries, Merlin transformed into a more traditional wizard figure.
The original Merlin, Taliesin, was a bard but, as society became more literate between the 9th and 13th centuries, Merlin transformed into a more traditional wizard figure.