I tell friends all the time. It's not only vlogging, in 2018, you can pretty much make a full-time living with just a smartphone doing many things. Those things are full computers now.
One trick I have with the Lav mics, I velcro them to a selfie stick, so that I just plug one end into my iPhone, and put the other end to my shirt/jacket.
Great video
Yes you're totally right!
I still prefer shotgun mics for vlogging :)