Literally every Doctor in existence profited from COVID. They are paid through a number of streams, the largest one being their employer (who is beholden to grant money and private donations to continue operations, much of which comes from the Government and Pharma) and the 'best' profit area for Doctors is pharma reps themselves.

All of this is true, and a problem, but it does not mean that it pays for any individual doctor to say that the vaccine is good (or bad). This is all very indirect, and it no doubt incentivizes them to not be too critical of Big Pharma (or at least less than is warranted), but it's not that they are benefiting directly financially from recommending to their patients that they take the vaccine.

They will pay them in hundreds of different ways, fancy gifts / expensive tickets / additional work / etc. As long as they continue using their product.

Right, and that is a real problem, but individual doctors are not "using" the vaccine, are they?