That's true for most of us yes, OCR for reading signs/menus/mail ETC or barcode reading on products (though it can be hard to find the barcode so just using OCR to read the blurb is more common) are the main use cases. Object recognition is quite sparse in it's descriptions most of the time, and at other times wildly inaccurate. It's not good enough to depend on for much more than sorting photos in your camera roll from my and people I know's experience.

Color identifiers are also terrible across the board, even with good light, so that's out too. We may use them for currency identification if ours doesn't have tactile markings, but it's generally too slow and unwieldy of a method to do it while actually at a store, so most people do it at home and then fold their bills in different ways or use different compartments to keep denominations separate in their wallet for later.

Face recognition seems like it could be useful for finding a friend in a crowd, but you need a person willing to let you train your phone to recognize them, and it's kinda rude to take a picture of a large group without permission. It does help for telling you if your or another person's face is properly centered for a picture though...

Light level indicators are useful if your totally blind and you want to make sure you have enough light for good text recognition, and probably for something else I didn't think of.

Yes, certainly.