I'm sure there have been many controversial FDA decisions before, but this one seems significantly different. The reactions from normally even-keeled medical journalists have been blistering [0] and it's apparently already set a precedent that has resulted in other similar therapies which have also not shown any sign of improving outcomes, starting to be approved as well [1].
[0] https://blogs.sciencemag.org/pipeline/archives/2021/06/08/th...
[1] https://blogs.sciencemag.org/pipeline/archives/2021/06/24/op...