Not true at all.

FM wideband is something like 88-108MHz.

108-137MHz is a lot of aviation traffic.

7-144MHz lots of long range DX.

Then the 144-148 amateur band.

151-154 Multi Use Radio Service

433MHz has all kinds of sensor data from the world around you.

462-467 Family Radio Service (FRS) / General Mobile Radio Service (GMRS).

900MHz area has different types of beacons, cameras, etc.

1090 for Aviation beacon ADS-B

For other freqs you can often use an upconverter or downconverter to hit the freqs you need.

Examples: https://www.nooelec.com/store/sdr/sdr-addons/upconverters-do...