Look at it logically? instead of calling people names you don't agree with? not all Tories want an inquiry, just as many Lab want one too.
The new inquiry would be reporting on areas where the new recommendations haven't yet taken place or given time work, so their findings are then out of date.
It would be a mess.
That is why, until very recently the Tories didn't want a new inquiry either & refused Oldham too.
Aside, how many inquiries do you actually want? wouldn't be better to enact the recommendations first?
Personally, i think so many vested interests are now involved, it may be better to, longer term ask the UN or similar to investigate, our inquires seem to take years, by which time its left the public interest.