FH is more spin critical than BH so there stopping (trying to) the wrist quickly to launch the disc pivot between the fingers (momentum shift from the body to the disc) ensures best possible spin rate. Efficiency of the transfer of the momentum along with the angle change of the arm movement from back to front to the side. That same efficiency can be aimed for BH but there are different techniques to using the wrist and not having a strong wrist BH i see little added distance and a little later fade when i get a good stop. Having a stronger wrist FH the execution is easier and more consistent and the results are shown more brutally in case of a missed stop because of the inherent spin and accuracy demands of FH. That tells something about my accuracy FH

So you should try different methods of wrist use to see which works the best for you. Some allow free movement of the wrist from back to neutral, some back to right of neutral and some don't allow bending back much at all and snap to the right of neutral. Hyper spin is the name of the latter form. So far personally wrist has been one of my major concerns technique wise and i think i might have room to improve there. Because my major malfunction of getting the hips to turn at high speeds is hampered by having too straight knees often which is correctable but my damaged back ain't.
Physics wise trying to stop the wrist comes from Newtonian laws of movement. Anything that moves ain't gonna stop without interference so if you froze in place the disc would still pivot between the fingers and that is a mega quick movement because which weighs less and moves faster with the same momentum in case of a theoretical perfect momentum transfer (not gonna happen without a gorilla grip) a person+disc or just a disc? 175 grams is a little less than a thrower

Flat shots need running on the center line of the tee and planting each step on the center line. Anhyzer needs running from rear right to front left with the plant step hitting the ground to the left of the line you're running on. Hyzer is the mirror of that.