I think it was intentional, people resented being listed and recorded. One family member from wider family, a long liver, gave different places of birth each Census.
I think it was the 1861, my gggrandfather (1831 to 1901) gave his place of birth as Pillowell, Glos. As I worked backwards, this caused me a lot of trouble and time. It was only trawling through the Bishops Transcripts at Gloucester CRO (originals) large book, noisy dry pages, that I found that he was baptised Clearwell Chapel (All Saints, Newland).
1851, his father 1792 to 1857 correctly gave his pob as Mitcheltroy, Mon. His wife initially gave ditto. That was crossed out and T abby (Tintern Abbey) substituted. Why was this?
Otherwise, most people knew where they were born, it was important to them, long before nationalism, village loyalty. Village fought village, don't know whether it extended to men
.
Learned another bit of wisdom, courtesy my cousin who employed a genealogist to take my researches back or rubbish my researches, take your pick. Genealogist couldn't as PR's started a mere 7 years earlier although it blew the whole thing wide open. Great for me. It explained why so many missing burial entries. They were buried in the family roots parish Llandogo, Mon., the last dying in 1804 from whom we are descended.