You're seriously going to argue that your Cobra should affect the BGS the same way another player's Cutter might affect it?
Not the same way, but a chance to be equally, or almost equally as effective.
Look at it this way, credits are a joke these days. People are getting into big ships within days of starting. The status symbol of having a big ship these days is long gone.
And yeah, big ships are really more impactful when it comes to trade, but why not have small ships more impactful when it comes to smuggling or other operations where a small ship would be more suitable?