True for astronomical tides. In those areas where other things (western boundary currents, topographic changes, eddies, strong winds, waves, etc) influence the tides, particular the currents, things are not nearly so nice. I'm using "tides" in the common, generic sense of water moving up-and-down and sideways, on a daily or half-daily basis...not the more technically accurate meaning of astronomical forcing only.Tides can be predicted over 100 years in advance.
I certainly agree that the tables are only a rough guide....