We need to let this judge and his team undertake this, focused, task. After they report people can set up other inquiries to look at particular aspects of what happened.
This blog by a barrister argues it much better than I could:
Fact Finding.
He says:
As I write we can be certain that teams of (very expensive) lawyers are preparing the evidence on behalf of the many corporate interests involved. Similarly teams of (very expensive) experts will be instructed in an attempt to persuade the Enquiry that the party who instructs them are not at fault.
At the Enquiry itself we can be certain that many of the victims will give different, sometimes contradictory, accounts of what happened. None of these will be lying. It will need a careful and expert fact=finder to make sure every witness is treated carefully and sympathetically while the accurate parts of their evidence is fully and properly accepted.
Again we can be certain that lawyers, and pressure groups, for the multitude of parties involved will be putting through hotly contested versions of the facts, ranging from the basic terms of the contract, the technical aspects of the cladding, to what happened during teh fire.
Someone, and someone very capable, is going to have to cut through all this evidence to come to the truth as to what happened.
Until we can answer the question "How did it happen?" with some degree of certainty, we can't deal with all the wider issues that are so important.
Make no mistake this is going to be a difficult and laborious process. Getting to the bottom of, probably several decades, worth of policies, technical information and numerous witnesses (some of whom will be very anxious to deflect blame).