I don't think it necessarily means "all ideas are the same". You're right -- some ideas may be better than others, but until they're executed successfully, they're just ideas.
ie: There were multiple ways that Google could have executed their goal of building a search engine (engineering, sales, etc). Even if you come up with a 'better' idea, it may not be successful/valuable if you execute it poorly and make the wrong decisions.
ie: There were multiple ways that Google could have executed their goal of building a search engine (engineering, sales, etc). Even if you come up with a 'better' idea, it may not be successful/valuable if you execute it poorly and make the wrong decisions.