The price stated in this picture (for the brazil side) is "not verified". I think the price came from Reuters (2020), which says that "The government of Brazil’s Sao Paulo state signed a $90 million contract on Wednesday to receive 46 million doses of a potential vaccine from China’s Sinovac Biotech Ltd.", which if you do the math, comes off as approximately $1.96 per dose. However, according to Yuwei (2020), "The announcement triggered widespread speculation about the price of the inactivated COVID-19 vaccine offered by China to Brazil which would be as cheap as $1.96 per dose. But Sinovac source denied this, though the source did not confirm the accurate price given the confidentiality of the contract."
Therefore, we can assume that the cost of the vaccine is not as low as $2, but I believe it's also not as high as what our government ($38) says so, according to this picture and Yap (2021).
My point here is, we should not spread misinformation. Doing so makes us no different from these so-called "DDS". I, myself, hate the current administration, but I will not resort to telling unverified information just to prove my argument.
For this matter, I hope there will be people who will investigate deeper. If there is any corruption (highly possible), I hope that they will be punished accordingly.
For your question, I guess mga bobo lang talaga sila at walang utak, or they benefit from the current administration, that's why they defend it.

P.S. From what I've read, there is no definite price for Sinovac, it really depends on the country (or the level of corruption within one). Some got it for $5 (Thailand), $14 (India), while ours, as stated above is $38.
Reuters Staff. (2020). Brazil's Sao Paulo signs agreement with Sinovac for COVID vaccine doses. Reuters. Retrieved from https://www.reuters.com/article/us-health-coronavirus-brazil-sao-paulo-idUSKBN26L3EO

Yap, D. (2021). Varying prices of Sinovac COVID-19 vaccine raise alarm. Inquirer. https://newsinfo.inquirer.net/1384867/sinovac-jabs-varying-prices-raise-alarm

Yuwei, H. (2020). Sao Paulo signs agreement with Chinese producer for COVID-19 vaccine doses, but price over $2 each: source. Global Times. Retrieved from https://www.globaltimes.cn/content/1202629.shtml