Yes i remember a pilot who thought FIS was a waste of time that is until he flew to Staverton which was closed for motorcycle racing. Anyone who says FIS isnt of any value has limited experience. In the event of a problem which needs a diversion FIS can be extremly helpful. They can give advanced notice of clerances, arrange handovers, take coasting out and in estimates for over water flights plus get SAR to you if you get a problem.
If you have an engine failure and go down somewhere its nice to know that you have at least given some information to someone. Bit silly having £10,000 worth of radio which wasnt used and find yourself hanging out of a tree waiting for a passing farmer