We should prostrate often. When you prostrate three times you can keep in mind the qualities of the Buddha, the Dhamma and the Sangha, that is, the qualities of mind of purity, radiance and peace. So we use the outward form to train ourselves. Body and mind become harmonious. If young novices are sloppy or the aged monks appear unmindful, this is not for you to judge.
People can be difficult to train.
Some learn fast but others learn slowly. Judging others will only increase your pride. Watch yourself instead. Prostrate often, get rid of your pride. Those who have really become harmonious with the Dhamma get far beyond the outward form.