Can I really trust the effectiveness of the hair loss treatment and proceed with it?

My hair is thinning rapidly and falling out so much that home care just isn't enough to handle it.
I had a consultation, and the doctor recommended treatment using injections or lasers.

However, the cost is quite high.
I am worried about whether this hair loss treatment will actually show results.
Also, I am wondering how many treatment sessions are usually required to see noticeable results from the hair loss procedure.
I have mixed feelings because some people around me are discouraging me, saying that taking medication is the best option and that the effects of hair loss treatments are only temporary.
If anyone has actually experienced the effects of hair loss treatments through hospital therapy, such as thicker hair or less shedding, please share your honest review.