Are Hollywood writing jobs the next frontier for gig work? Here’s what a striking writer says.

As thousands of Hollywood writers strike, the union and writers have warned that studios and streaming companies are trying to turn writers’ livelihoods into “gig work.”

In an interview with MarketWatch this week, Adam Conover, a comedian and writer on the Writers Guild of America’s board and negotiating committee, said the companies are trying to change the structure of writers’ jobs.

For...