If by average consumer you are referring to "average purchaser of light bulbs", you are referring to a market that the Philips Hue products are not yet in.
The average Philips Hue customer is an early adopter who was willing to spend a large amount of money on a next-generation lighting system. This customer is an early adopter.
The question is not whether they should allow third-party bulbs, they already allowed third-party bulbs. The question is whether, after reaping the benefits of creating a product with compatibility built in, if it is a good business move to remove that feature via a software update.
People flipped out when their paid-for Kindle copy of 1984 was removed from their e-reader due to legal issues that were out of Amazon's control. And those customers were refunded. They chose to break the lighting of their customers due to user experience issues.