The SBD is NOT pegged to $1. Dan Larimer said it himself on WAM. It's programmed to never go below $1, but it can go up, and up and up. It can fluctuate and in fact it's good if it goes up.
I don't see how it can have any negative affects if we extract our SBD. I see if we extract our Steem that it can affect Steem and Steem Power, but SBD are made to be extracted, to be traded. As SP grows, it helps the platform, but we cannot insist that people convert their SBD to Steem, especially if SBD is their source of income. We can however encourage them to hold onto their SP and not power down.
I am all for your suggestion, holding on to steem power is the only way to restore balance.
I don't know which interview your referring to but I would suggest nothing can keep going up in value without limits.
Not without limits no, but it means that SBD going up in value is not something to be worried about.
The interview is on @JoshSigurdson's page, World Alternative Media. Dan talks about Eos and Josh asks him at some point things more specifically about Steemit and SBD and such.