It does seem like an overreaction to me but there is a big difference in cell towers and satellite uplinks/downlinks

Radio towers (sites) have widely varying quality control of their tenant's installations. Other transmitters can mix and amplify signals from other carriers without well designed and maintained RF filtering on each and every antenna. The more transmitters at a site the more carrier frequencies that can contribute to the mixing, and the more opportunities for poor or broken RF filters. At some busy sites there is almost nothing you can do to prevent this. Anything on the tower that acts like a diode can cause mixing, even without being amplified by another transmitter.

This usually just harms other receivers at the site however. But an airplane flying close by could theoretically be affected depending on how close it is.