let's face it mechanic is a bit of a dead end trade, it will be relegated to limited specialty so you'll only see the really good guys doing it in future not the swapsie brigade.
We are at the dawn of the electric age, and like cobblers and the old coach builders of old mechanics of today will be relegated to history faster than a lot of us may think.
Its true. Even consider the amount of throw away and replace instead of repairing that occurs. (which was the original intention of the drill sharpening comment)
They will still be out there, but they will be very limited and specialised.
Over time it will taper off.
I've just spent a week working with a Chinese fella and he said you don't really own cars there.
You scan the code, the car unlocks and you get out afterwards.
If it goes to electrical it'll be all plug in, and replace the components. Design it right and it'll be a few bolts a connector and that's it. replace the whole drive wheel and suspension instead of worrying about each piece individually.
A bit like many trades (and other careers) though, they have developed and changed.
A Blacksmith would now be a fabricator (sheet metal, heavy engineering, boilermaker etc)
Instrument techs in the 70s and 80s were using pneumatic controls and linkages, now its electronics.
Plumbers used to have to bend, thread, weld etc, now its quick crimp fittings.
Even drafts people. used to be a fine art with a pencil, now its all computer generated.
In the end its done to save time and costs associated with that.
The old skills wont necessarily disappear, but they will be reduced and limited in practice, possibly to those willing to pay.