There are issues with 5G, but not the conspiracy theory "gonna kill you!" kind, and those in the know are working on ways to keep weather forecast accuracy from being compromised.
https://www.washingtonpost.com/weather/2019/11/22/global-g-deal-poses-significant-threat-weather-forecast-accuracy-experts-warn/
Studies completed before the negotiations by U.S. government agencies such as the National Oceanic and Atmospheric Administration, NASA and the Navy had warned that 5G equipment operating in the 24-gigahertz frequency band could interfere with transmissions from polar-orbiting satellites used to gather weather data. This could make forecasts much less reliable, the reports found.
[Weather forecast accuracy is at risk from 5G wireless technology, key lawmaker warns FCC, seeking documents]
Specifically, these highly technical analyses concluded that if deployed widely and without adequate constraints, telecommunications equipment operating in the 24 GHz frequency band would bleed into the frequencies that NOAA and NASA satellite sensors also use to sense the presence and properties of water vapor in the atmosphere, significantly interfering with the collection and transmission of critical weather data.
https://spacenews.com/passive-microwave-5g-ams-2020/
In the last 20 years, passive microwave sensors on weather satellites have detected faint signals emitted by water vapor in the atmosphere from 23.6 to 24 GHz. Data drawn from those sensors “is the most significant contributor to reduced forecast error,” according to Developing a Sustainable Spectrum Approach to Deliver 5G Services, a paper released Jan. 13 by the Aerospace Corp.’s Civil Spectrum Management Group.
Those signals are “absolutely key to knowing what is going on in the atmosphere,” said David Lavers, a European Centre for Medium-Range Weather Forecasts scientist.
World Radiocommunication Conference delegates agreed to allow 5G technologies to operate from 24.25-27.5 GHz as long as equipment limits the strength of signals spilling over into the adjacent band.
Meteorologists, who say the limits do not go far enough to protect weather observations, are calling for further dialogue between the weather and telecommunications communities.
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