The job wasn’t just to get to Berlin. It was, more importantly, to destroy the German Army.
Eisenhower’s broad front strategy assured the latter.
While not without its difficulties and great cost, it was ultimately vindicated by complete victory.
Destroying the German army is probably a good, at least partial, explanation for Eisenhower’s broad front strategy.
Getting to Berlin before Patton seems to be at least a partial explanation for Monty’s approach.
I admire Eisenhower’s patience given the pressures he was under.