Unfortunately there are "scientists" who do this; I was researching cosmic rays and mass extinction events and found that there is a scientist who actually says cosmic rays are the main cause of current climate change.
https://en.wikipedia.org/wiki/Cosmic_ray#Postulated_role_in_climate_change
A role for cosmic rays in climate was suggested by Edward P. Ney in 1959[100] and by Robert E. Dickinson in 1975.[101] It has been postulated that cosmic rays may have been responsible for major climatic change and mass-extinction in the past. According to Adrian Mellott and Mikhail Medvedev, 62-million-year cycles in biological marine populations correlate with the motion of the Earth relative to the galactic plane and increases in exposure to cosmic rays.[102] The researchers suggest that this and gamma ray bombardments deriving from local supernovae could have affected cancer and mutation rates, and might be linked to decisive alterations in the Earth's climate, and to the mass-extinctions of the Ordovician.[103][104]
Danish physicist Henrik Svensmark has controversially argued that because solar variation modulates the cosmic ray flux on Earth, they would consequently affect the rate of cloud formation and hence be an indirect cause of global warming.[105][106] Svensmark is one of several scientists outspokenly opposed to the mainstream scientific assessment of global warming, leading to concerns that the proposition that cosmic rays are connected to global warming could be ideologically biased rather than scientifically based.[107] Other scientists have vigorously criticized Svensmark for sloppy and inconsistent work: one example is adjustment of cloud data that understates error in lower cloud data, but not in high cloud data;[108] another example is "incorrect handling of the physical data" resulting in graphs that do not show the correlations they claim to show.[109] Despite Svensmark's assertions, galactic cosmic rays have shown no statistically significant influence on changes in cloud cover,[110] and demonstrated to have no causal relationship to changes in global temperature.[111]
Unfortunately this denialism shouts down the very real possibility that a supernova explosion induced cosmic ray barrage caused a relatively recent mass extinction event.
https://en.wikipedia.org/wiki/Cosmic_ray#Possible_mass_extinction_factor
A handful of studies conclude that a nearby supernova or series of supernovas caused the Pliocene marine megafauna extinction event by substantially increasing radiation levels to hazardous amounts for large seafaring animals