The FAA is concerned with loss of control, LOC accidents. If we back up to before stall/spin, we experience mush. And before mush, we have a short or even long period of kinetic zoom reserve deterioration. All of this results from our pulling back on the stick in hope of climb or greater rate of climb or even faster level or climbing turn rate.
Helpfully, since 2013 flight test standards change, we are expected to accelerate in ground effect to Vx or Vy as appropriate on takeoff. In less than perfect conditions, however, Vx or even Vy can deteriorate to the mush condition. And neither Vx or Vy as appropriate is what Wolfgang called zoom reserve. Maintaining zoom reserve, and thus maneuverability, is more important than gaining altitude quickly.
Zoom reserve requires enough airspeed, level or climbing, to easily maneuver at any bank angle briefly. Maintenance of zoom reserve in any bank will require our lowering the pitch angle by releasing back pressure. Airspeed can be traded for altitude and altitude thus gained can be traded for airspeed as needed. Dogfight quality maneuvering is safely possible using the thrust of modest engines and energy managed airspeed and altitude. Getting to altitude patiently retains zoom reserve.
Because big engines are popular, airspeed developed from engine thrust is readily accepted, and unfortunately expected. Tremendous potential energy of altitude, becoming kinetic energy of airspeed if we just allow the nose to go down naturally in the turn, is not as popular and is less utilized in a crisis. Utilization of vertical space available may be Greek in most flight schools, but it has tremendous potential in mitigating or overcoming LOC. We don't need stall practice altitude. Started early enough while still able to maneuver, before loss of maneuverability, fifty feet of altitude can give us a real kick in the pants.
Things don't always go as planned, but we are pilots. We are in control. Unlike skydivers, we do not require at least 600 feet of vertical space available to maneuver efficiently. We need only one foot over obstacles and terrain. If we are at Vx and mushing, pitching further up is only going to make it worse. If we can't give up enough back pressure to make a safe turn at the bank angle necessary to miss the tree, we should try to hit the tree and zoom one foot over the tree. Over the tree we can level the nose and perhaps even pitch down into the drainage.