Would you want your employer to know about your exact food habits for years of your life?
How about your government?
How about your insurance company?
How about your government?
How about your insurance company?
Badging for food doesn't say anything about the evolution of Google's culture over time; it only says that the IRS is now coming after Google.
Your government is mandatory, your employer is voluntary.
Your insurance company would likely offer you a discount if you provided them this information. Again, on a voluntary basis. In general when something like this is required by an insurance company it's heavily regulated.