Yeah, I mean I've accepted it as "common sense." For some reason though basic science and physics seem to be ignored a lot on the internet these days though.
I've love treadmill. But I've done Mile Repeats at 12mph on 0% incline and it feels like about doing mile repeats at 5:15 pace outside on a track (on windless day). Get that incline up to about 1.5% and the increase in power and workout put might negate some of the air resistance benefit.
I've gone into detail on a "Treadmill thread" on here about all the reasons why treadmill running is different from outdoor running. For example, a lot of people perceive treadmill running to be "harder" because they get hot really fast (or bored) and mentally are not simulated. It also changes your form very slightly and there is the fear of catching an edge and falling (or losing your balance). Finally a lot of treadmills aren't even calibrated accurately so who knows exactly what pace/effort you are running.
But for Taggart even 150-miles a week is probably too much. Now I've trained "with" (err behind) guys like Brian Sell who probably needed to run 160-170 miles a week to run 2:10 and make the Olympics. But for the fast majority of OTQ kinds of guys (if sub 2:18 is one's goal). 150- miles a week (especially for someone who works a real job) is pretty overkill.
He'd probably be better off around 120-miles per week and running some workouts outside on the track/roads more. Sure there is a risk for injury with the pounding of the pavement, but the leg muscles need to get used to that work out put to run up to one's potential in the road marathon.
Boasting about doing a 1:06 half marathon in training as workout on your treadmill and counting that as a "PR" isn't the way to run a sub 2:18 or even a sub 2:20. He's got a chance if the weather at Grandma's marathon is favorable and he's got some new Carbon plated shoes.
Kofuzi ran a PR btw....gotta respect that! I think for him a BQ is more important (for his followers) than actually cracking 3 hours. It's a good goal though...and he can certainly sneak under 3 hours.
As far as "YouTube influencers" and content creation goes. I've been at this game for over 12 years (on YouTube...longer on Facebook...). It's always changing (and I don't always have the time and energy to keep up). Even as a pro runner you've gotta evolve. Social media has changed everything (in a lot of good ways but also a lot of bad ways). I will say it certainly helps to have a few things: 1. Extra Time on your hands and 2. Financial Security