That’s the thing: The company doesn’t do the job. A subcontractor does. The job done isn’t a product or service of the company. They find someone (generally the person most willing to do the job for the least money) to go into your house and install the flooring.
For personal experience, a company my husband used to be affiliated with was a subcontractor (sometimes) for Flooring America. They did jobs in really ritzy homes and not-so-ritzy homes. The owner paid his employees cash under the table and hired drunks and junkies who would riffle through homeowners’ medicine cabinets looking for pills.
Flooring America, of course, didn’t know anything about any of that.
You do have the option of finding your own installation company. It’s less convenient than letting the store do it for you, but you’ll have a little more control over who you eventually let into your bedroom.