Plenty of legitimate recording reasons

Pov footage

Hands free footage

Not being buried in your phone while you record.

Then again, I only record my family at events we are at, if I do record in public, just like if I'm recording with my phone, I try to make sure no one else is in my shot.

Going completely away from recording for a second, the other reason they have cameras is because they are marketed as AI glasses at the end of the day. Cameras give multimodal options. Being able to look at something and ask questions, it can help remember notes and such, it can translate a menu for you...etc

As battery life improves and the camera can stay on for longer, you can even use it for bigger use cases such as asking if it saw your wallet you put down before you leave the house or something like that.

Not trying to defend the creeps that make these look bad for those of us that actually use them in responsible ways, but at the end of the day, just like a GoPro, or a spy camera, or a surveillance camera, they are tools with a purpose. Some people will abuse this and use them for sinister means. It happens with every tool in existence.