No. Psychedelic therapy sessions do not always produce the desired result, even with solid preparation and skilled support. Expectations shaped by media can be unrealistic.
Outcomes vary: some people notice clear positive shifts, others see subtle or delayed changes, some feel little to no effect, and a difficult experience may only become useful after thoughtful integration. A small number may feel worse. For a concise overview, see this Q&A on whether sessions always have results: read more here.
Chances of a good outcome depend on factors like willingness to engage, preparation quality, personal chemistry and medications, in-session guidance, post-session integration, the nature of your concerns, and individual differences. Trip intensity does not guarantee benefit.
Bottom line: it can be powerful for some, but there is no guarantee for any individual. I hope this helps.