Outbound is the most controllable growth lever a company has: you decide the list, the message and the volume, and you get an answer within weeks. It is also the easiest to do badly, because volume hides bad targeting for a while.
Modern outbound is not spray and pray. It starts from a narrow ICP, fires on buying signals, runs on more than one channel, and measures positive replies rather than opens. That is the version the club teaches.