Firstly, an expert's opinion is just that - an opinion. Some things in life can't be cast in stone, mathematics, for instance, is based on indisputable facts, but pigeon racing is based on knowledge, which is made up of people's opinions.
Secondly, what makes an expert? In my humble opinion it is someone who is intelligent, well-read and well-informed, usually through experience.
The reason I got thinking about all this nonsense was when I happened to be refining my CV and reading as much as I could on the subject. The profile section that most experts say is really important and without it your CV is going nowhere. On the other hand, Sarah Berry - a well-known career coach - says profiles are lazy and most are badly written.
Whilst most profiles are perhaps badly written, it is her opinion that profiles are no good at all and what better way to stand out from the crowd than to write CVs without profiles if every other CV expert is guaranteed to use them.
Even if Sarah Berry is right about profile sections, I still think she could be too smart for her own good. The reason being, if 90% of the population think profile sections should be included in a CV, that leaves 10% who would rather leave them out. So my thinking goes like this, by going with the majority on something rather than the minority, you are more likely to find someone that agrees with your way of doing things. Although that might sound obvious, what I'm getting at is that by doing what you perceive to be the best way might be of less importance to what is the most popular.
For the record, I have included a profile section on my CV, which I hope is well-written.
