How is his assumption false when your just "betting" that your correct? And are all Mac owners members of this forums?
If you don't use your optical drive, it doesn't mean everyone else is the same as you.
Your assumption is not only false, but meaningless.
I think assumptions are neither true nor false. Without having any substantive data about how many consumers use their optical drive and how many Pro use their optical drive there really isn't much to go on.
The MBA does point to a future where the optical drive is optional. I'd invite discourse from many on how and how many times they use their optical drive. My own personal experience is :
1. I rip my CD and then listen to the digital file.
2. I rarely backup to CD anymore once USB Flash went above 4GB (faster and easier)
3. Much of the software I install can easily be downloaded and activated via a license key.
Digital files are a more green solution. I'm looking to eradicate polycarbonate discs as storage. Don't we have enough in landfills across the globe?
Optical drives take up a huge amount of storage. If many of us are not using them often enough Apple should consider making them optional for notebooks.
The MBA is a step in this direction but it also reduces port count and what a ideal (IMO) MBP does is maintain the port count and in fact increase it.