A. The crook is made larger to have room for your partner to fall in practice. In SD you don't want them to have room.

B. Yes, the 1" diameter oak canes are heavier than they need to be and cause more problems than it helps

C. It's got a nice big stamp in the front that says "Cane Masters". And the street version has all kinds of nasty things on it that you will never convince a cop you bought it to help you walk. It's a weapon not a cane and you would be treated as such by a LEO.

D. A cheap walking cane from the drugstore has none of these limitations and won't cost a fortune. If you ever need to use it and it breakes in fight? Buy another.. it was only $3.95.
There are no PERFECT techniques, only perfect execution for the situation at hand. ~Corwin