By a large developer showing interest in a project, it indicates that the project has other avenues to become funded without putting causing the consumer to take a large amount of the risk. Why should crowdfunding become a common source of funding for game development when there are other options? A platform like Kickstarter (in which their is no guarantee for a final product) should only be used in cases where there are no other options. By Sony publicizing and providing funding for these products, they are showing that a game or franchise has options beyond crowfunding. Kickstarter is good for developers that literally cannot get enough funding from other sources to create the game that they would like to. If Sony stands to provide the brunt of the funding into kickstarted games, then why should those games be kickstarted?
You really have no clue how much games cost to fund, do you?