Because Transparency

We were always at war with Eastasia:

The Commons heritage committee proposes hearings on policing internet content ruled offensive. Parliament has already banned hate speech under 1970 amendments to the Criminal Code: “To hell with that, sir.”  

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MPs seek to question the Treasury Board over a deliberate slowdown in disclosure of public records. Cabinet allowed the closure of Access To Information offices for the first time since 1983 as a pandemic precaution, it said: “There are people whose actual job it is to produce information for Parliament who are sitting at home.”

Also - erasing history will not protect one from it:

An Access to Information Act request has shown that Parks Canada is proposing the revision of plaques deemed "colonialist,” Blacklocks Reporter has discovered.

“All plaques will need to be reviewed by the historians and most likely go through vetting,” reads one of the released memos. The memos mentioned three Canadians in particular who "need to be reviewed" due to complaints lodged by staff and members of the public.