The simplest way to avoid traumas is to take certain precautions.
Concerning the wrists, when executing the bench press:
This is rarely due to a problem with the joint alone.
The pain is generally due to tendinitis.
Either because the movement was carried out too many times, even with a light load;
Or any of the other origins of tendinitis:
Dehydration, too much red meat, tooth decay or pain occurring at this time but due to another exercise incorrectly executed.
COMPLETE ARM EXTENSION?
During a career spanning thirty years in bodybuilding gyms, I have never come across the slightest elbow trauma due to complete arm extension.
Although this recommendation applies to the legs during the squat or when working on the bench press, I feel it is unnecessary for the arms.
If you want permanent contraction of the muscles throughout the series, it is best to avoid extension so there is no relaxation time.
However, people often get their breath back and recover for a few seconds with the arms straight, to complete the last repetitions in a series.
Except during a fall, knocking against the olecranon has never sent an athlete to hospital for emergency treatment!
Considering the complexity of the joint and the range of movements it is able to perform, a whole web site could be devoted to this subject alone.
I will only give a single recommendation regarding the bench press.
Arms straight, bar vertically above the eyes.
The low position is more traumatising if you bring the bar near the neck.
Keep the forearms vertical by not holding the elbows close to the body.