You clearly don't understand that it's not as simple as "Why can't iPad's and Macs co-exist?" This is a device that is an investment for some people and considered professional grade. This isn't some lifestyle choice like being Pro Life or smoking cigarettes.
We are debating the value and utility of the device, to understand whether we, as either pro users or pro developers, can vouch for this device. If we do not discuss it and firmly stand for either support or denial of it, then people won't have information to research when they make a decision on the device's merit.
You can't just tell people not to discuss things. if you don't like it, you can just leave the forum and come back in 3-4 years when you know where this device is/was.
For me, my vote is:
Mobile OS, it's useless to professional users.
App market doesn't support professional app development.
12" Angry Birds.
Should've supported the Stylus on OSX.
Professional users need X86.
ARM is awful for a full OS.
Sounds like the old arguments of:
Pro users need a command line
Who needs a mouse when you can use a command line
Floppy drive is a necessity
CD/DVD is a necessity
Why use wireless when I can plug in a Ethernet cable.
USB is slow and almost nothing supports it right now
Phones can't be used for real work
No one wants a phone that doesn't have a keyboard
Only Blackberries are good for corporate email
A computer needs a mouse to be useful
Tablets can't be used for real work
There are many more examples that I could come up with.
For millions of people an iPad is their only computer other than their smartphone. A 13" iPad makes perfect sense for them. I think people are stuck on the Pro moniker. A professional is just someone who makes money in a certain profession. Lot's of people write but a professional writer gets paid to do so, etc.
Also the app market does support professional app development. Just take a look at Omni's apps. Final Draft has been available for iPad for some time and it's the "photoshop" for screenwriters. Office is there. The IBM partnership is bringing pro apps into vertical markets. The iPad is dominant in the enterprise at this time.