Weirdly enough I'm an IT guy and can do all of those things, some of them only in a basic way which is why I leave taxes and car maintenance to the professionals.
I'd even doubt that. If you take an average and factor in that you might at one time have a crash due to your shitty driving, you'll always arrive infinitely faster.
It also has an inbuilt motor to distinguish leaking voltage from continuous AC.
Sorry if I didn't use the correct English terms and that wasn't clear enough.
In Germany you simply call it a Duspol and every electrician knows what you mean. Didn't research enough into the English description but it seems it's a two pole voltage tester with one pole voltage detection mode.
Oh most people can't drive. Recently read an article 90% of drivers overestimate themselves. I know I'm above average but by far not a good driver. I still try to become better.
TL,DR: no