Sometimes it is actually right to be conservative, run the clock, take the points, and trust your defense. Not always, but sometimes.
Fans have this super aggressive mindset all the time, but if the offense came out slinging and turned the ball over with a minute left for the commanders to put a drive together, you'd be complaining about that too.
Seriously, there really is no way to win unless you drive for a quick TD every single time. There will always be those who complain that everything wasn't perfect and how they would have done things.