Why people hired a wedding planning for their wedding?

Answer 1

There are several advantages to hiring a wedding planner. Firstly, there is a lot of detail involved in planning a wedding, and having a wedding planner helps ensure that something isn't being overlooked, and can help with a timeline of "what needs to be done by when" (some things need more lead time than others... in a pinch, most flower shops could do up boutonnieres for the groomsmen on fairly short notice... say, a day or two before the wedding... but it's generally a bit late to be looking for a caterer then).

A wedding planner also is probably familiar with various service providers (venues, DJs, caterers, etc.) in the area, which means they are likely to know off the top of their heads where you might, for example, be able to find a place to hold your wedding outdoors with a waterfall in the background.

They also probably know from experience whether their former clients were happy or unhappy with a given choice. If a particular DJ was hired by one of their clients and showed up late, stoned, and with no music that wasn't either Death Metal or Raffi, they will likely steer you towards a different DJ. Unless, of course, that's what you want.