With all due respect, you may be correct making this statement today but it's likely not relevant hereafter.
Without revenue/partnership/non dilutive financing/ etc the doctor will be forced to issue the shares he has available to fund the company. He would have no reason to covert the preferred shares now or any time soon (most likely). If, worse case scenario, the company continues to issue the AS to fund operation maxing out the AS then the doctor could raise the AS again to covert preferred shares.
There is no way the AS was raise to give the doctor room to convert his preferred shares that he just got. He could have issued himself common shares if that was the case.
The science needs to get the company out of this mess and likely will with the key players now involved. All in my opinion