Except there is plenty of evidence that Peter Adkinson was more interested in saving the game than buying another brand to expand his empire. Sure he wanted to make money as well, but the purchase of TSR was as a White Knight wanting to protect the brand from being auctioned off in the dissolution of TSR in bankruptcy.
Again, I'm not saying that Adkinson and WotC didn't love the game, but in my opinion, if they were also in it for money/the brand, it's not being a White Knight.
As people often say about rules changes - had D&D stopped being published with the end of TSR, there wouldn't have been some police force that went out and collected all our books. The WotC crew could still play their games; all of us would still have our 2E campaigns (or whatever other RPGs we were playing).
I don't think the game needed saving.
WotC enjoyed their gaming experiences and had fond memories. They also saw some value in the brand. They had some ideas for how to grow it and rework parts of it to, with luck, make it more fun. This would obviously have the benefit of giving all the D&D fans new books to enjoy, but as publishers, this mainly meant revenue.
I'm not trying to ascribe black hats to WotC in place of this white knight image. I don't think they "stole" D&D or anything. They wanted to help improve the game (and I generally think they've succeeded), but they are a business, and that means they exist to try to make money.
As far as I'm concerned, if one of your goals is to make money (or perhaps, more exactly, to earn profit; this distinguishes those fans who share their own material but derive income from showing ads to support their site), then that is mutually exclusive from altruism. Obviously, your view of altruism may differ.