Why does a country having a large latitudinal extent have only one standard time?

A country of large latitudinal extent should have only one standard time because there should be no confusion of time, so the standard time is taken from a particular place for a whole country. If the country does not have a standard time, all the functions will take place at the different time which might lead to a hectic schedule. It is difficult to rule with two or more times. This type of variations can cause several differences in official and another job which are depending on proper time accuracy. For example, in Russia, there are eleven-time zone so a person standing at one end will have to call in the night to reach another end in midday

That’s why these countries follow an average standard time of all time ranges to avoid any time-related confusions.