LAGUNA BEACH, Calif.—Harvey Weinstein’s pattern of alleged sexual-harassment is emblematic of a systemic problem in Hollywood and Silicon Valley of tolerating the behavior of top performers, executives Jeffrey Katzenberg and Arianna Huffington said Monday.

Mr. Weinstein’s behavior was characteristic of “casting couch” abuse that has long tainted Hollywood, Mr. Katzenberg, a show-business executive who has worked with Mr. Weinstein, said Monday at The Wall Street Journal’s WSJ D.Live technology conference.

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