Just how inspiring or even persuasive you find Greta’s speeches and overall activism likely depends on where you stand on the political spectrum. There are plenty of politicians and regular voters claiming to be inspired by her words and passion. There are also lots of observers expressing general alarm at what they see as an indoctrinated child being coerced by adults to make their political arguments with her youth as a shield from any criticism.
I think she’s being used. Her words, mannerisms, voice tones and inflections say that she’s been brainwashed.