Your facts are old, very old.
Transmissibility has been linked to the nasopharyngeal viral load during onset symptoms. [https://pubmed.ncbi.nlm.nih.gov/33296437/] The virus may not be as present in your nasal discharge, or breath. We've also known from the start transmissibility is also definitely not linked to the severity of symptoms.
When you read from articles from the CDC such as [https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-si...] they don't mean all people spread it the same way, just "we have found it spreads commonly in these three ways".
Ironically enough, we traced my positive infection to a non-human animal which sneezed in my face. Within a day I had conjunctivitis (pinkeye). I had non-typical symptoms before severe fatigue set in. I just thought I was going through bad caffeine withdrawal at the time.
Locked inside the house with my spouse and kids for two weeks with symptoms, breathing all over each other, laughing in each others faces, touching the same items, etc.
I only got tested on day 13 when the respiratory and heart symptoms set in. 6 months later I still have some lingering issues. Nobody else in the house or who I associated with ever got it, and they tested every 5 days for a month.