I tend to agree that this is probably the best number to use if we're going to pick one, but I'd rather know for sure rather than guessing!
If it's a 60% vs 95% chance of being asymptomatic, then I'd say anyone rejecting one over the other is just being an arse, deal with it.
But if it's a 60% vs 95% reduction in transmissibilty, or as you say severe disease, then yeah it really matters for a healthcare worker who is basically 100% guaranteed to get the virus given enough time.
I guess they're probably all correlated anyway since that's how viruses work innit. Personally I'll take whatever I'm given!