First I agree RFK jr is the worst possible HHS secretary imaginable. There has been tons of funding pulled for mrna vaccine research for respiratory viruses which is terrible.

That said:

1. Funding hasn't been pulled for mrna vaccines for cancer. rfk has been equivocal about the topic. NCI is stilling rewarding grants for mrna-vaccine cancer trials.

2. Pulling funding is different from blocking vaccines from reaching the market. The new season's covid vaccine is presumably an mrna vaccine. For cancer vaccines, it would be very strange to fund a vaccine just to block it from the market.

Should we hold these people accountable?

What do you mean? The court of public opinion seems to hold them accountable. Are you proposing legal punishments for Marc Andreessen? For what specifically?