Red sock
I agree but there’s a simple answer.
The early leavers may not appreciate what davening is. To many people davening is a bother and a burden. Its not fun. Its Avodah (avodah shebelev) it takes hard work to daven like a mentch. Many people have no connection to their davening. Every second is torture for them and they can’t wait to get out of shul.
We should be happy these people come to shul at all.