IMO, a good T would never intentionally trigger a client. That is just unethical. Incompetent/inexperienced Ts may accidentally trigger a client but that is different from using the unequal power dynamics of the therapeutic relationship to exploit a client's vulnerability. I do not see how this can help recovery in any way and instead is likely to damage trust - the fundamental basic of therapy.

Like what the others have said, some more confrontational therapies do entail a certain degree of pushing. That is fine because without hard work there won't be results. But again, pushing =/= triggering.