You're wrong, that's not heartless gamblers, that's concerned gamblers IMO who are trying to do their best to predict the evolution of the disease with the informations they aggregate.
I agree. Just placing a bet won't make anyone heartless. Gambling sites allow users to make bets on most of the topics that affect them, and not just sporting events. And making a bet is not going to make the pandemic any worse or better. It is the duty of the WHO and the national agencies to make sure that the pandemic remains contained. No need to blame the gamblers for this, when they are unable to do their job.
I kinda agree with both of you too. Gamblers here just only speculating the result of the pandemic, everything that has odds for them can anyone able to make betting. The WHO for sure is working their job and doing its task to find a cure as soon as possible, there's no correlation between the gamblers and the WHO staff, why they are argued that it becomes worst because of the gamblers.
Any activities or events that have odds can gamblers make betting on it and even political election has.