Some came with excuses; some did not even ask.
Two kinds of staying behind
Ibn Kathir describes bedouins living around Madinah who came to the Prophet ﷺ to explain their weakness and inability to join. Ibn Abbas said they had valid excuses. Others, who had lied to Allah and His Messenger, simply stayed home without asking.
You cannot make it to your friend's event. One way is to call, explain honestly, and apologize. The other is to go quiet, leave the messages on read, and hope no one notices. The verse treats those two very differently.
If I cannot do it anyway, explaining does not matter.
How honestly I face what I cannot do matters to Allah.
If you are avoiding someone because you let them down, send an honest message today.