You are talking about a single pilot operation in which you are trained as "pilot in command".
In an airline you will be second in command, at least for the first few years. On a two men flight deck the pilot in command bears the full responsibilty for the safe execution of the flight. Even when the copilot
- up, the captain will be the can carrier and thus be made fully responsible for anything what happens on that flight . However this does not mean that the copilot will not be held responsible if something goes wrong because of his own shortcomings!
The take- off run up to V1 (take-off decision speed) is very critical therefore only the captain will brief and eventually initiate a take- off abortion if required. There is not sufficient time for a "team assessment" close to V1.
Don't worry your time will come where you shout STOP!! And slam these levers back.....