She'll have to defeat another King before she can digest any truths. She hasn't always had people bow down to her in her previous conquests. She had to show them what she could do before they even listened to her. Yes, it mostly involved fire and burning things but this is what she can do that no one else can. She earned Drogo's respect by showing him different ways to have sex and eating a horse heart, she earned the Dothraki's respect by going into the fire with her dead husband and coming out unscathed with new born dragons, she earned the respect of others by freeing the slaves and burning their masters, then she earned the respect of all the Dothraki by burning down their other leaders and walking out of the fire unscathed again. No one just bowed down to her because she said she was a Queen. The Unsullied, the Dothraki, Ser Jorah, and Tyrion are following Dany because she earned their respect.
Does she always make the best decisions, no, But neither do Sansa and Jon. They have all done stupid things. None of them are perfect rulers and no will ever be a perfect ruler.