The point is H3+ is really unstable in anything like a normal environment.
This thing really wants to react.
So how come there's so much of it floating around?
Now it turns out that there are at least 2 pathways to produce it, one of which could occur not just in a near perfect vacuum but in denser media. Don't think lasers, think very close to a star.
The payoff is when this mechanism is used to update early universe formation models to show what this does to the levels of H3+.