My thinning hair persists. Is hair loss treatment effective?

My hair is thinning, and I am experiencing persistent thinning where my scalp is visible. I am at a crossroads, wondering whether I should undergo hair loss treatments that regenerate the hair itself, such as injections or stem cells, or choose a procedure like scalp tattooing that provides immediate visual coverage.

Injection-based hair loss treatments are a fundamental way to restore hair health, but it seems like it will take time for results to appear. On the other hand, while the other methods offer immediate coverage, I'm worried about smudging or discoloration later on. I'm curious to hear about the satisfaction levels and tips from those who, like me, struggled between these two methods due to overall hair density before making a decision.