Elderly couples selling their houses for apartments. So why do people put so much emphasis on buying?

I live by a lot of elderly couples as well as worked for them in their homes. They've all told me that once they got older, they sold their homes because home ownership was too much work. They love the convenience of an apartment. So why do people stress buying houses to only turn around when they get older to rent an apartment?
Elderly couples selling their houses for apartments. So why do people put so much emphasis on buying?
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