The use of a bankruptcy court, to a layman like me, looks suspicious, even after reading all the comments explaining it. Is this not what class-action suits are

The use of a bankruptcy court, to a layman like me, looks suspicious, even after reading all the comments explaining it. Is this not what class-action suits are for? Combining similar cases into one to save court resources? This seems like a backwards way to go about that which affords J&J lawyers more surface area from which to litigate about technicalities, loop-holes, etc. My assumption is they determined this first $65 billion will be enough to make the problem go away. Claimants will get a big check, but not big enough to launch further litigation to get more out of the company. IMO, this is solving a problem that does not exist. If one or two initial claimants were to clean out the whole company then subsequent claimants could sue them for their share, or the courts could step in and enforce a class-action.