Not really fair or accurate. Academia killed "classical" music. (Long discussion possible) Williams and his compatriots (e.g., Korngold, Steiner, Yared, et al.) are guilty of nothing worse than keeping classical music on life support during the 20th and 21st centuries, preserving the possibility of a public whose ears are capable of parsing something more profound than I IV V IV I. (Louie Louie)I found this interactive timeline of classical music interesting. Worthwhile taking a look, especially for people new to classical music and struggling to put composers into historical context.
https://time.graphics/line/487
The timeline stops after John Williams. Would it be fair to say he killed classical music?