Pattern: thanks for that. If indeed 1st a/c accepted an immediate T/O and were not !00% ready that is the root cause and not professional. I would assume ATC said "traffic at 3.2nm are you ready immediate?" If so, and 1st a/c knew there was imminent landing traffic they should have been more cautious and not accepted.
"If there's doubt there is not doubt."
I can imagine that if the roles were reversed and the captain of the 1st a/c had in fact been in the 2nd and forced into a G/A there would have been some steam & choice words in his cockpit.
"It's better to a few minutes late than a few years early."