Yes, science gives conflicting reports. However, the consequences of being wrong can be quite different. Extra precautions, e.g., wearing masks, refraining from singing, might keep the virus from spreading. If those scientist are wrong, no harm done. If those who find wearing masks and singing has no affect on spreading the virus and we follow their advice, and they are wrong, there can be deadly consequences.
Believe who you want to believe, but for me and my house, we will follow the safest guidelines - even if the science will end up showing they weren't needed.