(I found the default fee seemed way too low during Covid, so I'd bump it up, while still penny-pinching to avoid the smaller fee for a more desirable delivery window. When the added delivery fee is unavoidable tacked-on, maybe that will feel more like I'm paying for the delivery, even the driver isn't paid as well as I think they should be.)
The wage negation between the person executing the order and the service is none of my concern.
Let's consider Company A building a SaaS product. Company B (person or LLC) wants the product with 3 additional features.
Company A hires me, I write the features and they provide the service to Company B.
I don't expect Company B to tip me.
When you order Amazon Fresh, and there's a default tip for the driver on the order, do you zero it?
An earlier additional consideration was during the worst of Covid, there was initially no vaccine, and we didn't even know how it spread. Lots of people WFH, but delivery drivers could not. So a tip could've additionally been gratitude or acknowledgement that them being out there working was saving people. A lot of other people working then, we don't have an opportunity to thank/acknowledge, but this one was easy.
Oh America. Start paying your people a proper salary and stop obfuscating real prices from your customers.