The C++ 11 move semantic is definitely an example of C++ programmers being sold a "pig in a poke"† The claim in the proposal document was that although this isn't the "destructive move" which programmers wanted (and which Rust had by 2015), the C++ 11 move feature can be realised with less disruption and is just as good. In reality it left significant performance on the table and you can't get it back without significant further language change.
† This phrase would have been idiomatic many years ago but it is still used with the same intent today even though its meaning is no longer obvious, the idea is that a farmer at market told you this sack you can't see inside ("poke") has a piglet in it, so you purchase the item for a good price, but it turns out there was only a kitten in the bag, which (compared to the piglet) is worthless.
Copy by default is the right way to go. Even if less performant, it’s safe and super-easy to understand. Let the people that want to squeeze the last drop of performance worry about moves…
Move by default is the thing which complicates Rust so much.
† This phrase would have been idiomatic many years ago but it is still used with the same intent today even though its meaning is no longer obvious, the idea is that a farmer at market told you this sack you can't see inside ("poke") has a piglet in it, so you purchase the item for a good price, but it turns out there was only a kitten in the bag, which (compared to the piglet) is worthless.