> to have a big wedding like how the article describes funerals in Zimbabwe.

I clicked through to the linked about Zimbabwe, and the article misrepresented the research (at best). The paper notes that when families have unexpected funeral expenses, they hold onto assets if they only have one in that asset class at the expense of temporary food insecurity, which would be like not selling your only car in the face of a shock medical bill and opting for cheaper groceries/ramen.

The paper notes that when Zimbabwean more than one item in an asset class, they are likely to sell one (or more). This reads a lot like generic loss-aversion and not specific to attitudes about death, which would require to be controlled against expense type (e.g. weddings, environmental disaster or unexpected loss of income).