All employers have a different take on this, but from what I see/hear/read, they offer the minimal amount of heath insurance coverage they can in their industry and location to attract the level of employees they want.
It shouldn't come as a surprise that the medical field seems to offer the best coverage.
Last week I had occasion to chat with a couple of nice middle-aged folks at our hospital who push wheelchairs with patients to/from rooms to various tests/procedures in the hospital. They simply worked there for the insurance. One told me that his 'regular' job paid more in 2 hours than a week working at the hospital, but offered no insurance. The other lady had been a homemaker to a self-employed man. She had never paid into Social Security/Medicare, so so pushed wheelchairs for some income and the insurance. Both told me that they walked 8-15 miles a day and had never been in better physical condition.
Jim