It depends on your viewpoint. What if you sent something to someone by mistake... this "feature" allows you to correct that mistake.
That's fine. If
I have written something,
I should be allowed to delete that from being viewed by all parties. No issues there.
If
I have written something, and
you decide you don't want to see it, then
you should be allowed to delete it from
your device. Again, no issues there.
However, if
I have written something,
you don't get to prevent that from being viewed by all parties, and
you definitely don't get to delete it from
my device. That's censorship, and I have no idea why anyone would use an app which lets third parties delete
your data from
your device without your consent.