What do you think about this gaffe from MSNBC?

This video clip went viral shortly after it aired. Host Brian Williams is talking with NYT editorial board member Mara Gay about the tweet that another journalist put out. The tweet stated that Bloomberg spent $500M on his campaign and that there are 327M people in the US. So that means he could have given each person $1M instead of wasting it on ads. Williams and Gay both were talking about how illuminating that was and how true. They later had to apologize for being “bad at math”. But does that speak to how irresponsible they are for pushing false facts without even a basic thought as to whether they are true or not?

https://www.newsweek.com/brian-williams-mara-gay-nyt-bloomberg-math-wrong-1490953