"In hindsight I absolutely wish I hadn't said that," he said in a wide-ranging interview.
"I was very confusing. I actually completely misunderstood that I was giving an interview that would be judged on Twitter."
Subtler Message
It may seem surprising that Roberts, who built his entire career on getting companies to adopt effective messaging, was completely taken aback by the ferocity of the response on social media.
Roberts, 67, who recently became chairman of UK communications firm Beattie, said what he was trying to advance was a more subtle message, which got lost in the firestorm that followed.
Firestorms over the gender debate have hit the ad industry before. Last year, a female employee of J. Walter Thompson filed a discrimination lawsuit accusing the agency's CEO, Gustavo Martinez, of making racist and sexist comments. He later resigned. Back in 2005, Neil French, then worldwide creative director of WPP, quit amid outrage over his comments at an industry event that women don't "make it to the top because they don't deserve to. They're crap."
Roberts, who says his motto is "fail fast, learn fast and fix fast," thinks his comments last summer led to "pretty fast failure." That after 20 years at Saatchi and previous executive positions at Procter & Gamble and PepsiCo.
Everyone has moved on. My feeling is whether you want a top job or not is not a gender issue, it's a lifestyle issue. As many women want a top job as men.
He says his comments were misconstrued.
"I felt the debate now was not about gender but really about how to inspire everyone irrespective of gender to be the best they can be," he said.
His point, he says: "Let's not stop talking about race or class or gender, let's more start talking about inclusion."
Demeaning Comments
A 2016 survey of 600 women in advertising by the 3% Conference, a group that advocates the advancement of female creative talent in the industry, found that 91 per cent of women have heard demeaning comments from male colleagues and 54 per cent have been subjected to unwanted sexual advances.
The advertising world remains a tough place for women to get ahead on their own merits, said Kat Gordon, founder of the organisation.
"He's discounting what women want and are up against," Gordon said. "They do have ambition and they're hitting these speed bumps over and over again. Ad agencies are not meritocracies or free of sexism and there are not equal opportunities."
Many women at Publicis were upset by Roberts's comments, said Kate Stanners, who was then the firm's worldwide chief creative officer. She later also took on the role of chair, replacing Roberts. Stanners said women currently hold half the top jobs -- managing director and above -- at Saatchi in London, where the firm is headquartered.
And in the last few months, "Everyone has moved on. My feeling is whether you want a top job or not is not a gender issue, it's a lifestyle issue. As many women want a top job as men."
Roberts, who was already due to retire in May 2017, the same time as Levy's planned departure, is now advising several companies in his native New Zealand, in addition to his role at Beattie. He hasn't backed away entirely from his original comments, saying many women -- and men -- don't desire to move up the ladder.
"Some people want to do work rather than manage work," he said. "I don't think that's a lack of ambition. Frankly, I think it's a higher ambition."