Even with that proviso it's still wrong. These animals were found in 2010 to be living in a completely anoxic environment with 2.9 mM of sulfide(!).
So they consume oxygen at night, in their roots, etc. This is most apparent for the occasional parasitic plant without chlorophyll. https://en.wikipedia.org/wiki/Albino_redwood
https://www.pthorticulture.com/en-us/training-center/basics-...