That would be very annoying if that is the case. I have a feeling you may be right though :(
The only thing that looks like it could come out are two rivets on either side. I wouldn't imagine it would be that difficult if that was the way to change the bulb though?
Strange that Google...
Please help! We had these recessed lights fitted about 2 years ago and a couple of them have gone. How on earth do I get to the bulb to replace it? Thanks in advance! I'll try to upload a photo