During wrestling drills, even at low resistance levels, there is often some sparring involved with partners resisting techniques. Techniques with dynamic elements should be done with caution during drills.
By committing to high repetition against a non-resisting opponent for a sustained period of time, martial artists can gain a deeper understanding of their own body movements and how to effectively apply pressure to the human body.
The utilitarian purpose in jiu-jitsu often gets lost in the details, but the ability to move like water and crash or flow at the right time is what ultimately leads to success, both in a fight and in practice. The Saitya brothers are great examples, and while Bruce Lee is often cited, it's important to remember to only focus on the techniques that serve a purpose.
Having a reliable gripping system is crucial in Judo to dominate the grips, control the movements, and initiate reactions from your opponent ultimately leading to scoring opportunities. Without it, it may feel like you are not even playing Judo against good black belts.
The American system of judo relies on perfecting an individual's techniques and implementing an American-style grip, conditioning, and game planning to beat opponents. Training includes a grueling eight-round Randori session with four or five challenging opponents in a row.