miniDV tape based 1080i hidef camcorder and edit pretty regularly. I don't understand why you think miniDV would "eliminate the ability to edit the footage and recreate home movies". I have also used various standard def camcorders and also imported via firewire.
MiniDV tape based camcorders connect via firewire and import the video to the computer - you can also export finished projects from the computer to the camcorder for archiving (to tape).
MiniDV tape based camcorders also use USB to transfer stills from a memory card - but video from the tape comes over firewire. The firewire port on the camcorder might be labelled "DV".
FireWire, IEEE1394, i.Link and "DV" are all the same thing. http://en.wikipedia.org/wiki/Firewire
Hard drive (and memory card) based rigs typically do a file transfer (like copying a photo from a still camera) via USB. Yes this step is easier and takes less time. When you walk through the entire process, this ease and time savings will get used elsewhere - so the trade-off becomes video quality and miniDV wins on that.
Different people need adapters for different reasons...
http://www.usbfirewire.com/Parts/rr-527950.html
Though I don't know why you would want this. Seems expensive, too. Most traditional Windows manufacturers have not included FireWire on the machine (the Sony Vaio higher-end machines do) - but have several USB ports (my HP/compaq laptop has no FireWire and 2 USB on the right, 1 on the left. FireWire is preferred for video import because is streams high-speed. USB (2) can burst high speed, but cannot stream high speed and is not recommended for use when importing video. Data file transfer is not "import".