Why are the tables in high-end restaurants so long?

Generally, it's western food because everyone has a problem that they can't get distant food. The most important person sits on the short side in front of him. Next, he sits next to the first person according to your important level. And there are parties. Many parties are self-help, so long tables are also used. Because these forms or other dining forms suitable for long tables are only used in high-end restaurants, but they are not used in ordinary families and restaurants in our country, so you think long tables are very advanced.