I think we have to remember the context of the times.
1) Religion and moral opinion was used to control the populace. It was extremely important to maintain appearances of propriety.
2) If your father had disappeared into the night one day and never came back it wouldn't be something you wanted to discuss with your future spouse and in-laws at your marriage. Much tidier to say they were dead
3) or to tell the census taker you were a widow, instead of "I don't know where the blankety blank that man got to and I don't care"
4) A married woman had more status in the eyes of the neighbours than a widow or abandoned wife. It also kept other men away. Even today a widow is more attractive to most men than a divorcee

Something about their desire to prove themselves - whatever

5) Maintaining the status of marriage was also convenient, in case the spouse ended up with unfortunate results from her own dalliances (if any)

6) There were huge problems with alcohol. Many people, particularly men were semi-drunk 24/7. So if the odd one fell off the back of the horse on the way home from the pub, they didn't always get found. No tidy little panda cars showing up to search the bushes....
7) I wonder if anyone has done searches for how many death by misadventure verdicts were handed out at inquests when bodies were found. There must have been a fair few of them that were unidentifiable. No picture ID etc.
We have all had the benefit of literacy and relatively healthy living conditions. Most of us would be horrified to see how our ancestors really lived - not just the state of the buildings but the overcrowding, the odiferous drains, the never ending damp inside and outside, the fetid air from coal fires, the constant pregnancies etc. etc. Most of these people were malnourished and had resulting lower IQs and or foetal alcohol syndrome. If that was your lot in life you must have had very little energy or imagination to spare for luxuries like wondering where your abusive old man got to on a dark and stormy. And if you didn't want him back then you wouldn't even look would you??
I guess my point is the movies and period dramas we have all seen are sanitized versions of the real tough conditions the vast majority of our ancestors lived through. For one thing the stories are always weighted towards a quick beginning in rags before the rest of the Cinderally story in riches, EG Jane Eyre, Dickens etc..,
Sorry to run on and hope I haven't depressed you!!!
