This is an odd argument. You're basically saying that being more knowledgeable about something makes your opinion less useful. Everyone knows there's bias but if you're arguing that we shouldn't value someone's opinion because they're an expert then we're not going to progress very far in society. I'm not saying you have to take his word as divine truth but dismissing experts is extremely naive.

If you're knowledgeable in one field primarily, I think it's likely you have some bias towards that field. If you are doing a lot of research only in e.g. Solar, I think it'd be harder to provide an unbiased comparison between solar and nuclear than someone who studies power generation in general.

EDIT: At a first glance, the linked article seems reasonable if not a bit optimistic for future developments and very positive phrasing for NPP in general.

> If you're knowledgeable in one field primarily, I think it's likely you have some bias towards that field.

'It is ever the domain of specialists to overstate their domain.'

Sibling comment is basically what I meant and my general opinion about the linked website as well.

> You're basically saying that being more knowledgeable about something makes your opinion less useful.

In certain contexts I definitely think this. Imagine you're a CEO that has to decide how to distribute profits among departments. Obviously you'll listen to the head/experts of every department to weigh your options, but you can't really trust them to be unbiased (Obviously not the best analogy but I hope it helps get my point across (: ).