Whatever you might think of them individually or as a group, this whole 'movement' if it even is one, is at least engaging people to think about and engage with issues. That has to be seen as a positive, I mean before YouTube and the likes came a long what did people consume? Pure shite from daytime TV and radio? Ideally the more people engaging with issues the better.
There is a concern about echo chambers and a pseudo circle-jerk forming when the same guests are just going on each other's shows and straw-manning or cherry picking certain things from the radical left. However this same thing could be aimed at any number of political or philosophical publications or broadcasters. From what I've understood there's a fair bit of disagreement between the likes of Peterson and Harris when they meet.
The only one of this supposed 'intellectual dark web' I've ever really listened to is Peterson on Rogan's podcast and on that shameful C4 'interview'. Bret Weinstein and his wife who's name I've forgotten were also on Rogan once and that was an interesting listen too. Personally I think it's a good thing they are gaining popularity, it's just up to the other side of the debate to put forward similar personalities to offer an alternative. I've always believed that education and ease of access to information is paramount. This platform of long-form debate and communication that we now have through the internet can therefore be a great benefit.
The likes of Harris, Peterson etc are really just one of the early waves I think. Like anything it's important to think for yourself and not take everything you hear as gospel. One problem you see more and more these days is dismissing someone entirely if they say one controversial or horrendous thing. That doesn't really add up. If you have a good argument in one area, having a faulty belief or argument in another doesn't mean the former should be discredited too. What it does mean is that you have to consider carefully and critically which parts of their argument you think may be correct or at least interesting and be more than ready to disagree on others.
For example with Peterson he is a very religious man, so your alarm bells should be ringing straight away when he wants to tell you about why monogamy is important or how he uses biblical parables to explain how we should ideally live our lives. On the other hand, you can look at things like compelled speech and his arguments on why equality of outcome is a dangerous idea and clearly see there is merit there.