100% agree, one thing for those who don't indicate, and convince yourselves 'I don't need to indicate to an empty road' - BLIND SPOTS, Every car has them however well designed they are , as someone who has also been a lifelong cyclist and motorcyclist (and car driver) I cant tell u how many close calls and a few actual collisions I've known of, and unfortunately been involved in, and the excuse almost ALWAYS - I just didn't see you , and before everyone piles in with the bad standard of road discipline that some cyclists and motorcyclists use - and how they often go too fast, that's for another debate. .Lets assume that no-one here actually wants to be in a crash/collide with another road user.
I'll accept the premise that automatically indicating MAY reduce awareness but I can personally vouch a car that indicates before the maneuver gives the other road user 'they just didn't see' extra warning and an opportunity to take evasive action to avoid a collision.
For those advanced driving individuals, there's a reason in motorcycle training they tell you always assume they haven't seen you!
Also the looking twice before maneuvering mantra and the advent of blindspot detectors in cars while both helpful, neither are infallible
Until car manufacturers start making. the pillars from glass, front and rear blindspots will exist, and I would hope everyone understands the basic physics that a 5 - 6" pillar beside you becomes a cars length blindspot 30' away.
And that's the reason to always indicate - even to an 'emoty road' .
For those of you that convince yourselves (justifiably) you are very safe drivers because you have driven many decades without an incident, I sincerely hope that continues, BUT no-one knows what will happen tomorrow, an unblemished driving record could also be seen as form of complacency - human instinct, the longer something doesn't happen to you, the more you will (unconsciously) convince yourself it never will.