Expert or Eggspert that is the question.
As defined in the English Oxford Collins Dictionary. What is an expert ? A person who is very knowledgeable about or skilful in a particular area.
So who decides who is an expert, you, me, the man in the moon, Uncle Tom Cobbly, Wallace and Gromit ?
On the one hand you never come across a poor Bookmaker.
On the other hand if you start winning too much money, the bookie will cap your betting or block your account because they are handing over far too much money to you for their liking, and that is why you never come across a poor bookmaker.
Pubs up and down England are full of experts, because they are knowledgeable about football like people on this forum, and many are skilful in this area.
If a bookmaker told me night followed day, I would go and ask somebody else.