Hell, I feel fine with banning elves/dwarves/halflings/gnomes (and rules relating to them) if it doesn't fit my campaign.
I go with a line item veto - after I have access to the supplement in question. The book would have to be pretty awful for me to ban the whole thing, but I do want to see what you are trying to slip past me first.
In many ways, I too prefer to run 'dead' or 'closed' systems. It lets me set up the world to support the game as presented without the worry that sudden changes to the ruleset will send ripples through the campaign.
D&D will never be a one-book only, never-errata'd/updated game. Never.
The problem is that new rules are what people buy.
We saw this in the OGL days. WotC made the d20/OGL hoping that other publishers would put out adventures and similar for a common rule system. Instead everyone published rules, and rules are what sold.
The cold hard truth is that we will buy rules more than we will buy other supplements. WotC wants to make money, and so they need to produce what the market desires.
Yes, that may have happened in the ancient past but it won't in the future.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.