I hate that too, but I think it’s more the ux than the concept of a default. There are definitely situations (“here’s the default install path, press enter to confirm”) where defaults are a good experience, and LLM generated ones can fall in this category.

What I hate about sentence completion or suggestion is usually that it happens right when I’m trying to think and so destroys my focus, it’s actually way worse than just a passive option, it’s actively harmful to the task I want. The worst is google docs “help me write” - that may be gone now, I’ve blocked it with ublock origin, that waits until you’re thinking amount what you’d write and then hits you with a distracting pop up. It’s obviously PMs that don’t care about their users and want to maximize some AI use metric.

Anyway rant aside, it’s the interface more than the concept that’s the big problem.

Agreed, I find the cognitive load of checking the suggestion much higher than just writing my own message.