I know who they are, but their heyday ended 5 years before I was born. They never had a gold or platinum album and their highest charting single reached 10 in Canada and only 25 in the US.
I know of their immense influence on other artists, but couldn’t name five of their songs. My point is, people of a certain age aren’t going to know every famous artist in music history. Every music fan experiences this. I guarantee I could tell you more about 90s metal or hip hop than someone who is 70, just like that 70 year old with have more knowledge of 50s and 60s music than I will.
My formative music years were about 1986-99 That’s my wheelhouse. I couldn’t tell you much about anything released after 2010 or before 1980 or so outside of the legends like the Beetles, Stones, Aerosmith, Skynrd, CCR, Zeppelin, etc.