No and no.

They're not grapes, they're bugs. Good protein source. More comparable to seeds or nuts in terms of how filling and nutritious they are. Also not every country thinks you need supersized dishes to be full. If you're never stilled your hunger by eating a small amount of food perhaps you should try it.

Also, you will not get diseases by eating stuff. Actually, you might, because your immune system is likely shit if you really think this will get her sick. But we as humans evolved with an immune system for the specific reason of being able to eat things off the floor without getting sick from them. A few centuries ago we didn't even know what bacteria were.

You are way, wayyyy too coddled for this subreddit.