Depends on your perspective I guess. I've not been to a grocery store for 3 months, or any other shop for that matter. We've been on lockdown in the UK so home delivery and collection have been a far better option for many of us.
Based on the one in one out policy, the directioned isles, and the screened off cashiers I think I'd rather take my chances in a supermarket than in WDW. My thinking being that you will have kids run around, you will have idiots getting too close, etc.
Based on what it's been like with Universal and Sea World people arent respecting the situation, with tons of people walking around without their masks.
In regards to touching - its Disney World. You have to touch something ever few seconds. Even with the mass cleaning that we know will be taking place its still going to be vastly worse than a grocery store.
I'm struggling to see how WDW can be considered a 'safe place' for this at all. It's so much more than just "Clean things a bit more".