Comment by DeltaCoast

It's possible the OP was just trying out different storefronts and either doesn't have finalized assets or doesn't want to pull them up to try it out. When publishing or going live I agree with you, but in my experience most sitebuilders/storefronts have a draft / unpublished version - in which case uploading logos/product images/favicons/etc - isn't necessary until going live.