On the other hand, there are indeed many scientists/engineers who look/act "nerdy" or don't have the suaveness of people we typically see on TV. I think what GP is saying is that typically companies will put forward people who are good-looking and charismatic for PR, so it's nice to see someone different and unpolished be center-stage in the public eye.
I don't think it's a bad thing. I think a lot of the differing opinions here stem from seeing the people on screen as primarily either engineering or PR people. So I think mabbo meant "nice to see an authentic engineering type thrown in with the PR people", whereas Yetanfou thought he said "Of the engineers on screen, that guy is the only one that looks like one". They're kind of standing up for the same principle though: inclusion of people in a role that goes counter to stereotypical outward characteristics.
There's a balance. Sometimes I enjoy watching someone nerding out about a subject. Charisma means they'll sometimes start banter with the co-host rather than continue with things interesting to them. Or they'll try to "make" things entertaining and exciting.
I guess it depends if you're looking more for entertainment or information.
I disagree, even if you don't care about banter, a capable host will be able to drive conversation and get panelists/guests/interviewees to express themselves better (even if they are typically awkward in front of a camera). I see it all the time in professional esports streams.
