If you ever need to convince someone that steep climbouts is a bad idea, here's what happens in the glider world.
Traditionally glider winch cables were made from steel. They had a finite life, so cable breaks were very, very common. More modern winches now use dyneema or some other type of high-strength carbon fibre/composite so breaks are less likely but still not unheard of.
During the winch launch, the whole launch sequence is carefully designed so that if the cable breaks at any point, you can always safely recover. This means we work in stages.
Once the winch starts pulling the aircraft rolls along the ground initially. As soon as the wheels leave the ground, you need to push the nose down, otherwise the couple from the winch may pull you vertical (has to do with the hook location on the fuselage). You keep the nose down (at most some 20-30 degree nose up) until the aircraft reaches a height of about 50 meters. At that height you can slowly raise the nose, perhaps to as much as 60 degrees nose up.
A 300 HP winch pulling at a glider with only 20 degrees of pitch means the aircraft is constantly accelerating. To possibly as much as 2xVs, or even into the yellow band (>Va). That's perfectly OK: You need that speed to set up the glide attitude if the cable breaks.
Once you are at a safe height and start pitching up more, the speed automatically reduces. To maybe 1.25 or 1.5 times Vs. That's fine as well as we now have the height to setup the glide if the cable breaks.
(Most competent glider pilots actually transition smoothly from one stage to the other, initially trading height gain for speed, and later on trading speed for height gain.)
Steep launches, where the aircraft gets off the ground and immediately gets into a 45-degree or more pitch up, are severely frowned upon and will cause a reprimand from the lead instructor. Or even grounding. People have died from that type of launches.