But they aren't destroyed. 9 of those "destroyed" will be rebuilt at facilities to be provided in Poland and/or Germany. There was an article on it somewhere on how modern NATO/western vehicles are moduler and can be rebuilt even from serious damage - often with parts salvaged from one vehicle being able to repair another.
Edit: This is an article on the subject - not the one I read, but it shows the point I am making:
The USA had provided Ukraine with 190 Bradley vehicles, about a dozen of which have been fully destroyed; the Ukrainian military lacks spare parts for their repair. Source: The Washington Post citing sources Quote from WP: "'The United States has committed 190 Bradleys overall, with more than...
news.yahoo.com