Agree! Sometime it may be easy to say but hard to do. You (general YOU) have to understand why your opponents wants to grab your wrist in the 1st place.
1st - the wrist area has the smallest diameter compare to the rest of your arm (easy to hold).
2nd - by holding on your wrist, your hand can be a nice handler to secure his grip (easy to pull).
It's so easy to break that grip, why your opponent still wants to do so? Most of the time when your opponent grabs on your wrist, he will have a "plan" in his mind. He may want to:
- shake you downward.
- drag you in circle.
- borrow the counter force to pull him toward you.
- use your leading arm to jam your back arm.
- set up a trap and wait for you to punch him with the other arm. When you punch, he comb his hair and then enter.
- the wrist grab is only the 1st step, the elbow grab will be the 2nd step, and the neck choke will be the 3rd step.
- draw your attention on that wrist grip.
- ...
If he uses his hand to grab on your right wrist, he will be on your "right side door". If you try to punch him with your left hand, all he needs is to use his hand to pull your right arm across your body. His arm pulling force (move your body to your left) will counter your back left arm punching force (move your body to your right).
Since when and how your opponent will pull your arm will be up to him, he will always be 1 step ahead of you and your punch will always be 1 step behind. IMO, it's better to break that grip first. The easiest way to do is just rotate your arm in the direction to against his thumb (1 finger). When you do that, you can grab on his wrist and put him in defense mode instead.
A striker and a grappler may look at "wrist grab" from different angles. But it's better to understand why a grappler may want to grab your wrist in the 1st place. It may not be as simple as you may think, "If you grab my right wrist, I'll punch you with my left fist".