I don't see the difference between owning an individual guide page and owning a rare signature cut from a larger piece or album page. The history of the item is no more being destroyed as it is being altered for another purpose. Either way, as long as the recipient of the item is pleased with and enjoys it I don't see the issue or how it hurts the hobby.
For example I own this and other pages like it:
I picked it up here on the B/S/T a few years ago. It's on a shelf next to my desk. I appreciate the history of this team and wanted something to display that depicted it and that was from the period. I'm also a father in college with a mortgage and wife with a credit card so I'm realistic and sensible with my purchases. Hell, I'll probably take a pay cut when I enter teaching next year. I'll likely never own anything that graces the first 20 pages of an REA catalog, but I still want to collect the game's entire history. It's still a hundred year old artifact, its still historic, and it is still being appreciated. If someone here has a period cabinet or composite that depicts this team to replace mine for what I paid for this tell me where to send the check.