Value in knowing that virtue ethics is a thing, yes, but also value in knowing how it compares with consequentialism and deontology.
Classical heroes are not generally good people in the modern sense; they are powerful people. Think The Boys and Watchmen rather than by Marvel and DC. Even supposedly anti-hero modern characters like The Punisher and Deadpool are closer to/less far from the modern understanding of heroism than the ancient heroes are. Though I guess James Bond would be about right, he's a lot more like the classical heroes in that he's generally misogynistic and his violence is directed at The Other, with Q serving in the role of Hermes giving Perseus winged sandals, a sword, and a cap of invisibility.
> Havamal
ᚦᛖᚹᛁ᛫ᚲᚨᚾ᛫ᛞᛟ᛫ᚦᚨᛏ᛫ᚠᛟᚱ᛫ᚠᚢᚾ
ᛁ᛫ᚨᛗ᛫ᚾᛟᛏ᛫ᚲᛟᚾᚹᛁᚾᚲᛖᛞ᛫ᛁᛏ᛫ᛁᛊ᛫ᛗᛟᚱᛖ᛫ᚹᚨᛚᚢᚨᛒᛚᛖ᛫ᚦᚨᚾ᛫ᚹᚨᛏᚲᚺᛁᛜ᛫ᚲᚨᛈᛏᚨᛁᚾ᛫ᛈᛚᚨᚾᛖᛏ᛫ᛟᚱ᛫ᛈᛚᚨᚹᛁᛁᛜ᛫ᛞᚢᚾᚷᛖᛟᚾᛊ᛫ᚨᚾᛞ᛫ᛞᚱᚨᚷᛟᚾᛊ
(Was I taught this in school? No. Did I have the kind of mother who kept some runic divination books around even though I was theoretically being raised Catholic and going to church in part because the best local school was a Catholic school, and thereby teach myself to read the inscription around the outside of the dustcover of the first edition of The Hobbit? Yes).
> Classical heroes are not generally good people in the modern sense; they are powerful people.
I think it's more apt to say that classical heroes were envisioned as 'real' people. While I think almost all people are inherently moral, nobody is "good" in the way that we often like to portray - it's a facade. That facade did not exist in the past, and I think it makes the works consequently much more human in nature.