It's all about how you use it... That's what my dad told me once...
Ok, seriously though... Here's where the confusion seems to come in... There seems to be this concept or idea from those who use and/or like or are satisfied with lower wattages that anything higher than they use is just excessive... I think I remember seeing that vid you mentioned that Phil did... But the truth is, he did it all wrong... No really... he did... Notice the first thing he said was about how hot it was? Well, if it's that hot then you're doing it wrong...
Let me state it another way real quick before I get on to the explanation... If I cook hot dogs on my stove and use the "#3" setting... And it works just fine for me.... Does that mean that I should question why anyone would want a stove that goes all the way to 10?

Sure cooking your hot dogs on 10 might burn them... but try boiling a pot of water with it on 3 and see how long it takes...
So anyway... Here's the thing... If I take a crappy clearomizer and run say 6 watts... It'll give me a decent vape... Very little vapor, but decent none the less... Crank that same clearo up to 15 watts and i'm going to get the dry hit from hell... It's gonna be hot, it's gonna be burnt and it's gonna be terrible....
On the other hand, put a really good build in a kayfun and all of a sudden 15 watts is just providing a decently cool vape... Lots more vapor than the clearo, but still cool and good...
Throw a plume veil on there at 15 watts and potentially it won't even heat up the coils... (depending on build)... Let alone vape...
So here's what you have to understand... It's about air flow and surface area...
Think about this for a second... If you enjoy a vape from a clearo set at 7 watts.... What if you instead took two egos with clearos both running at 7 watts and toked on them at the same time? You've now got double the air flow and double the vapor... you're running 7 watts... but the taste is exactly the same, it's not any warmer than the single one... it's just more vapor and more flavor....
Get it? Run 14 watts on a single clearo and you've got the SAME surface area and SAME air flow... it's going to be nasty.... but double the surface area and double the air flow and you've just got more vapor but the same kind of vape...
To me, that's the idea behind these high power mods... When I build for my 75W mod I build VERY large coils that have TONS of surface area... On top up that I use an RDA that has a TON of airflow.... The end result is a TON of vapor that's LOADED with flavor... Yet it's barely warmer than what you'd experience from that 7w clearo.... And yes, I am in the process now of looking for a 150W mod... Because sometimes the 75W just isn't enough... But I can assure you that at 100+ watts I can get just as cool a vape as you can from a clearo... Though I do like it a LITTLE warmer... But I can also assure you it has a TON more flavor...
Is it cloud chasing? Absolutely not... Why? Because to me the focus of cloud chasing is exactly that... clouds... I like a lot of vapor, don't get me wrong... but I can't stand a .1x or .2 build on a mech at 4.2v... It DOES kill a lot of the flavor no matter how much airflow you have... To me that's cloud chasing... Sacrificing the taste and flavor for clouds... But it doesn't have to be like that when you've got the higher voltage to go along with it and can use that higher power to drive much larger surface areas.
Does that help?