Macbook Pro running Sierra: When I try to log in, it brings me to macOS utilities. Cannot reinstall macOS
Without being certain it sounds as if you are ending up in Recovery mode, why is another question. It may be that you have a damaged hard drive.

If you have a Thunderbolt cable and another Mac then the easiest way to get the files off the Mac is to boot into Target Disk Mode. Do this by holding down T while the computer boots. You can then connect it to another Mac and read the hard disk as if it was an external drive.

Alternately, if you have an external drive with Mac OS you can attach it and hold down option at boot and then select the external drive as the boot device.