Don’t you think it was a limit

Not only you but everyone have only 24 hours in a day and they also need to use them to the best they can, so value the time people take out for you whether it be your friends, family, employees, employers or your spouse, etc. It be anyone if you don't value their time someday someone would do same with you.
Recently met someone who was invited to a meet up by someone and he tried reaching out to them on the day of meet-up but they didn't responded as a result of which he left something important and went for it and in return found that he just wasted his 3 hours and didn't even attended that important meeting and in response he got to hear that they thought if they don't respond he wouldn't come.
Don't you think it was limit of carelessness?