Actually I tend to agree with a lot of what the guy said. The typical domestic room is never going to sound "good" like a pro recording studio--ceilings too low and parallel with the floor, parallel walls, etc. etc. Unless you're very lucky, I tend to think that most home recordists are better off using screens and such to go for a dead acoustic rather than trying to make a 12 x 14 bedroom sound like Abbey Road.
But...and it's a big but...most of us use the same space for mixing as recording. This adds a whole new dynamic and a whole new reason for acoustic treatment. For mixing, your goal isn't to have the room sound "good"; it's to have it not affect the sound you're hearing and cause you to add too much or too little bass...or whatever. For the place where you mix, some treatment--carefully placed bass traps, acoustic panels, etc. etc. can make a big difference and, built yourself, are a cheap way to improve things.
Beyond that, all the discussion about mic placement and technique is right on the money. That can make a big difference in a room with dodgy acoustics. Frankly, I rarely if ever bother to make the room tone a feature of recordings--unless it's a great space it rarely helps. Instead I use a mix of different (and moveable) screens behind and/or beside the people I'm recording to keep thing dead then add fake ambience later. Some of these screens are the PVC pipe frames I've mentioned many times elsewhere--but my real "find" is a three-fold Balinese scroll work wooden screen. This, with a movers blanket behind it, is a life saver.
Heck, for spoken word I even use a Reflexion filter!