Whether you choose to have a maid or not is your own personal decision and you should not feel any "peer group" pressure to have one, particularly if you are not comfortable with the thought of having another person in your home and being totally responsible for that person.
It seems that for every "good" maid story I hear half a dozen "bad" maid stories (just look at some past threads on this Board!). I decided right from the start not to have a full time maid. Instead I have a lovely girl who comes in once a week and does my ironing and cleans the house. If I need extra help she is happy to come along and assist at bbqs or parties. It is an arrangement that suits us both.
I don't find any of the other household chores I do so onerous that I need someone else to do them. I personally couldn't bear having another person in the house and I wouldn't know how to keep her occupied and anyway I hate living in a totally perfect house (boring people have tidy houses!) and the maid's room is full of our junk!
Like I said, it is a personal decision. Perhaps your friends are putting the pressure on you as justification for their own decision to have a maid (just a thought). It may also be a cultural thing - in Asia it is accepted practice to have a maid, where I come from (Australia) it is quite foreign to our psyche! Most of my (Australian) friends do not have full time maids.