I am of the impression that we want the questions and answers to be searchable and provide a good reference for physics students and above when using search engines.
There exist questions asked by ~15 year old kids and answered by the same age group, and checked as correct within a very short time. Here is a recent example.
I have great sympathy for all these young kids enthusiastic about physics, who should not be discouraged. But the level is sliding downwards, because often checked answers might not be looked at by somebody with more experience.
Are the moderators checking the content of checked answers?
In order not to discourage the young I would be willing to add a more sophisticated answer to bring up the level, and have often done it, but these are one off cases.
I think maybe there could be a list of questions, regardless if they are checked or not, for the attention for more senior physicists, as with "unanswered questions", example: "new answers useful". Then one could have a look if one could contribute something better, raising the physics sophistication level of the site.