PARIS, June 16 (Reuters) - Whether to break up dominant U.S. technology players is a legitimate question, French President Emmanuel Macron said on Wednesday at a panel at France’s biggest tech show Viva Tech. Macron on Tuesday outlined an ambitious push for Europe to create 10 technology giants worth 100 billion euros ($121.26 billion) each in valuation by 2030, in a bid to rival U.S. companies that dominate the sector.