Perhaps places should give full pass refunds and just do day ticket-only this year.
That said, I could certainly envision a world where lodge access is limited but anyone with a pass can use the chairlifts whenever they want.
Everyone keeps talking about the lodges, but there's a lot of other areas that would be impacted by social distancing requirements as well. It is conceivable that there are some sort of limits on who can be on a lift together (or how far apart people need to be on a chair). Any sort of restrictions like that decreases your uphill capacity. So now if you still allow anyone with a pass to use the chairlifts whenever they want, where will all those people be if there's less uphill lift capacity? Standing in the lift corral making those lines longer? How do you enforce social distancing there? Bottom line if there's social distancing requirements, I think the number of people on the mountain needs to be restricted.
I also don't agree with the earlier analysis in this thread that on an average Saturday resorts are only slightly above 50% capacity as is so we don't need to worry too much. If the numbers provided are accurate and the normal Saturday crowds that you see are really only "50% of capacity", then "50%" won't work as a viable benchmark to allow for proper social distancing requirements. Those numbers were also from pre-Epic and pre-Ikon days in the northeast (10 years ago), so I think that also calls into question whether they would even still be the case today.