There are certain moves that Dee Jay players have a tendency to throw out, not because they are strategic counters to the opponent's attack, but because the player is simply hoping for the best (i.e., that the opponent won't block them). Some of the most common versions of this you will see are Short Knee Shot attempts (often repeated several times in a row), EX Max Outs, and both regular and EX versions of the Sobat kick. The allure of these moves is that, on some occasions, they do actually hit, so the player is tempted to keep doing what he (or she) thinks is working. The problem is that these moves don't always work and when they don't, you're sacrificing a lot for it.
As an example, some moves like the EX Sobat are open to counterattack if blocked (when another Dee Jay does this move, I typically do a low Short into a combo that does close to 400 damage, just to point out the error of their ways). Furthermore, in cases where you are not vulnerable on block, you are still putting yourself at disadvantage at least part of the time. Even good Dee Jay players such as Japan's Kitasenju like to throw out the Sobat from certain ranges where the move is safe on block. But what happens if the opponent jumps before the Sobat ever connects? In that case, you are leaving yourself open to a potentially heavy combo from the opponent. In the best case scenario (where you don't get hit right off), your charge is still gone and you're likely to find yourself in a maul situation that you then have to get out of. A situation that YOU put yourself in.
So let's say, for the sake of argument, when you throw out these moves, you get a successful hit 50 percent of the time (which may be being generous). For tricks like the Sobat gambit, you are likely to get about 250 damage max and possibly a knockdown for your effort. This is decent damage but nothing for the opponent to be especially afraid of. On the other hand, the 50 percent of time that the Sobat doesn't hit, you can possibly get hit outright (such as in the jumping opponent scenario above) or you can lose advantage and get caught in a maul situation instead. That's not good odds IMO. Again, it's not that this type of trick doesn't work, it is that the trick doesn't work all the time and can leave you shafted in situations where it doesn't. So why take the risk with such shitty chances?
Don't believe me? Check out the video below of Kitasenju, one of the best Dee Jay players in Japan, and note in the first round how he manages to get some success with the Short Sobat trick against a Zangief player. Then watch how he gets bold in the second round and uses an EX Sobat with the same purpose in mind (around the 4 min mark) . . . EXCEPT, in this case, the Zangief player jumps before it, and Dee Jay both eats a combo and gets placed in a repeated maul situation that pretty much costs him the majority of his life bar.
TLDR: Don't take random chances that you don't need to. Small fuck ups can easily lead to big losses. ESPECIALLY where Dee Jay is concerned.