I have to disagree. A good video camera will beat hands down A DSLR camera price for price for video work.
I know I was advocating camcorders earlier on in this thread, but price for price, what you suggest is almost certainly wrong. I'm saying almost certainly as I have not compared every option against every other option.
DSLRs/mirrorless stills cameras used for video give very high quality at a lower price than you would pay for comparable quality with a dedicated video camera. They are also smaller, and with the larger sensor options, allow more control over depth of field than most camcorders would allow.
They have therefore allowed a low cost entry into professional level video, as well providing useful features for professional film makers who would normally use dedicated video cameras. They do/have suffered from issues such as aliasing, moire, rolling shutter and low bit rates, that have limited their use in the past, but this is much less of a problem now. The low bit rate was one of the reasons why until recently, DSLRs weren't used in broadcast, as the broadcast bit rate standard is/was 50mb/s
In terms of these issues Camcorders are still a "safer" buy.
But, the big advantage of camcorders is usability, as they designed for video, although this doesn't apply to all, the "normal" design of a camcorder allows operators to take its weight on their shoulder, the pre-amps are high quality, and it uses XLR connectors, will always come with a headphone jack, batteries sit on the outside of the camera so they can be quickly changed etc etc. You can get around this with a DSLR/mirrorless stills camera, but it just isn't as convenient or as functional as a camcorder.
The extreme zoom argument, is really a non-argument as for the vast majority of professional video, this isn't going to be needed, and the "quality" argument can go either way, depending on what you are comparing.
There is a lot of high quality video done on DSLRs/mirrorless, and its the obvious route to go for weddings, unless you can afford a camcorder. But that is an expensive option, with even something like the Blackmagic ursa mini coming in at around £5000 without a lens, and of course for weddings you would need a back up(s) as well.