When I look at many of these charts, for example CL Z17M18Z18M19 DF, it appears to be much more volatile, i.e. ragged, than the underlying outright CL so why trade this as opposed to the outright as with this volatility your stops would have to be quite wide.
I get what you're saying, but your concerns are easily addressed by solid spread construction technique. For example, here's the front month continuous Daily chart for the CL contract, which on a 14 period study will have an average true trading range of 141 tics, and a maintenance margin of $2,900:
And while not a "double butterfly" per se, here is a Condor CL spread, which on a 14 period study will have an average true trading range of 7 tics, and a maintenance margin of $420: