That's actually an example of going too fast in my opinion. I don't think someone can be ready to coach Liverpool to make them champions of the BPL. There are exceptions ofcourse, but you have to earn your badges (literally and figurally).
Being a coach is something totally different to being a player and you have to learn over the years in many different situations how to deal with different situations. Being a coach isn't just about putting 11 people on the teamsheet and doing the tactics. You will have to learn fysiology, training intensity, nutrition, coaching players, learn from scientific articels so you know what is fake and not and learn how you can innovate.
If you'd say that Gerrard would be an example to come for the job in 10 years, I'd totally agree. After those years you will have a clear idea how he actually performs as a coach and see him apart from the player he used to be. I might be wrong, but isn't he training the u19? That isn't starting at the very bottom at all. Just because he's coaching the best talents of the country.