I've grown attached to projects in small companies and large ones, sure. What you've written can be read as an explanation for why people continue to work at companies even as they grow larger and get worse, rather than any contradiction of what Graham said.
> And when you'll see what a hundred people can make out of what was started by ten, it will be very rewarding.
Really? I don't think I've experienced anything rewarding/inspiring being made by more than ten people; even in large companies, the most rewarding/inspiring projects I've worked on have been those that were worked on by a small, relatively isolated team. Scaling up may be necessary and/or lucrative, but I doubt it could ever be as rewarding as making the thing, and AIUI the economics research backs that up - productivity is concentrated in small companies, successful companies grow until they get too bloated to be successful rather than stable (because if you're successful, growing is the default path) rather than improving through growth.