They could, but it's clearly the part which can be replaced by anyone else. Without Pfizer we'd still have BionTech's vaccine, without BionTech we would not.
> clearly the part which can be replaced by anyone else
Not clearly. Looks at trouble with AstraZeneca's trial and manufacturing issues.
This is really a worthless pissing contest but got brought up in every Pfizer/BioNTech thread.