There are two types here: (1) Pardons for crimes not yet committed. (2) Pardons for crimes committed, but not yet convicted. The first type will allow the pardoned to commit a crime in the future for free, which obviously should not be allowed. The second should be allowed if we have this pardon system at all.
The second type became a political necessity, for example to protect Liz Cheney from a vengeful administration.
The second type became a political necessity, for example to protect Liz Cheney from a vengeful administration.