Simple answer; because the "data" will not stand up to scrutiny.
Because they dont want to..they think they can get away with it..up to now they have....
The simple answer is the data aren't driving the decisions. Policy is. The data is window dressing and is only used (in one direction) to justify policy not to dictate it.
Data not dates being one way was disingenuous at best. Even Drakeford in Wales brought one of the openings forward. It was never going to happen here. The law suit against hospitality opening indoors at the same time as shops appears to have been delayed so that it makes no difference to the eventual outcome. Naive I may be, but I think hospitality will open indoors on May 17th. As for all restrictions ending in June, I don’t think so.