That sounds great if SBD is $1 at the time, what happens if it is a month down the road and SBD is $2. Do you put all transactions on hold because the risk of dropping 50% is pretty significant?
Either way, I don't think you can ever trust SBD to be pegged again, not unless new tools are given to witnesses to have more control of the peg without the collateral damage the current tools to push it down creates.
I agree that more tools to keep the peg would be good.
In the example you are taking, there are two aspects to consider:
Generally yes, it would be better if witnesses had more tools to enforce the peg and if the peg was more stable. But I think you can trust the SBD to be "relatively pegged" - with a better certainty than for instance STEEM.
After that, it's a matter of how much risk one is ready to take - as I said, there is not perfect peg and a very shaky peg is still better than no peg at all.