Is it, therefore, somehow a misplaced appreciation of Bitcoin when many are ecstatic every time it is accepted as a payment for a glass of lemonade or a piece of banana?
Not really. People get ecstatic not necessarily because bitcoin is being used for one of the things it's intendedly made for(payments), but mostly because bitcoin is actually getting used in the first place. We all know that Bitcoin is already a household name, yet adoption is still very low.
Again, my point is that Bitcoin wasn't intended for those kinds of transactions. Yes, Bitcoin is intended as a payment method, but online. So if you're dealing with somebody face to face, Bitcoin isn't for it. Cash is the real peer to peer. There are no third parties in between. It's a great system that Satoshi wanted to imitate it in the online world where P2P transactions aren't at all possible.
So to a certain extent, buying a piece of cupcake from a nearby bakeshop using Bitcoin isn't really
adoption. It isn't the goal, after all.
I don't see any problem paying with BTC face-to-face. It is an add-on feature, instead of paying with cash, you pay with Bitcoin. And I think it is a positive sign the Bitcoin can be used as payment not only online or what so ever.
From the definition, an electronic transfer does not necessarily means you must order an item online and pay for it with Bitcoin. You can still do electronic transfers when you buy some snacks in a convenience store that accepts electronic transfers.
I believe the success of adoption is when every person is transacting with Bitcoin by paying for their goods in supermarkets, stores, and malls via electronic transfer regardless if it is face-to-face or not.