“There was no such thing as asymptomatic spread.”
The CDC seems to agree:
https://wwwnc.cdc.gov/eid/article/27/4/20-4576_article
That paper says the most transmission came from presymptomatic cases. That means from people without symptoms.
From a public health standpoint there’s no real difference between pre- and asymptomatic cases because you can’t tell them apart. You have to treat everyone as potentially contagious.