It's called triaging your tickets, not letting a bot roam free hoping to catch someone that didn't press a button at the right time.
It's disrespectful to the reporters' time and effort to keep pestering them with an inane bot. It doesn't fix the issues reported. It just makes the bot owner feel good that they have fewer tickets open.
I agree on most of your points but triaging requires resources - setting up a bot to quickly close stale issues is a poor stopgap but it seems they felt they had to do something.
