Take offs and landings are a choice. The only time you have to land is when you're out of fuel or on fire. One is bad planning and the other is bad luck. Commencing an approach is something that should be undertaken after careful consideration of all the relevant factors, environmental, mechanical, and human.
Crews must not assume the answers to these questions, "What are the potential threats and errors?" "What are the mitigation strategies."
Assumption success is not a guarantee of it. Just because a maneuver is allowed doesn't mean it is appropriate. Because the plane ahead was successful does not mean you will be. And if you get it wrong there are no do-overs.