Airbnb is just a catchy business name. It doesn’t mean that breakfast is offered, just as it doesn’t mean guests just get an air mattress to sleep on.
I have a private room listing and guests share my kitchen. While I provide tea and coffee, I have never provided breakfast, nor have any of my guests expected it. Most of my guests actually get up earlier than I do, and are up and out before I get up, having breakfast at one of the hundreds of eateries in my touristy beach town. I offer accommodation, I’m not running a B&B.
And many hosts who used to provide breakfast food have stopped doing so, as so much food didn’t get eaten and went to waste.
Like many aspects of hosting, much depends on your location, listing type, and demographic of guests you get. If you attract a lot of older couples, who may expect a traditional B&B type experience, or live in a remote location with no stores or restaurants around, then breakfast might be a good thing to offer. My guests are not interested in that.
I am certainly not going to be happy about washing guest’s dirty dishes, and have never had to do so. After preparing and eating their meals, my guests always clean up after themselves.
The great thing about Airbnb is that there are so many different listings to choose from, with different things on offer. Hosts not offering breakfast, or not washing the guests’ dishes, or anything else you may believe is important, aside from providing a clean, comfortable accommodation and all the amenities listed in one’s ad, does not equate to “not being serious about hosting”.
(BTW, I get solid 5 star reviews)
However, I do agree with you that there are far too many “investor hosts” who don’t seem to care about anything except making a profit.