The only reason we don’t “need” vaccines for other cold viruses is that they’re very rarely severe, right? I’d certainly take the shot if they existed.
Yes exactly. But how was it when they first appeared in the human population? We can't know for sure, but most likely they caused a heavy pandemic in the first years and then over time became "harmless".
Just think about how bacteria/viruses which were not really dangerous for Europeans wiped out entire populations in Middle and South America.
