When do we use minterm over maxterm in real words example or vice versa?
If you want your questions to attract answers, do not start the text with a &quot;This may sound stupid&quot; statement. You show courage posting the question which you might fear to be downvoted or derided, but one has to have a comparable or greater courage to answer the question that declares itself &quot;stupid&quot;.
You better try and prove that

a product of all variables in a function [minterm] ... [which] has the
property that it is equal to 0 on exactly one row of the truth table

is possible only when there is just one variable, i.e., the function is an identity or negation.
It is an exercise in Boolean calculus, and not bluntly trivial and unnecessary. For example, the Wikipedia article posits

It is apparent that maxterm n gives a false value (i.e., 0) for just
one combination of the input variables. For example, maxterm 5, a′ + b + c′,
is false only when a and c both are true and b is false—the input arrangement where a = 1, b = 0, c = 1 results in 0.

Notice, the article says 'it is apparent', and illustrates this statement with an example of a three-variable maxterm -- illustrates, but not proves. You can correct this omission, if only for individual use.