Of course, you need one!! To fill your desire. I have one just because they are antique and just plain cute to look at.
Want one? Have the funds? Found an acceptable one with a price you would pay? Then what's to stop you?
I have 2 singer Red eye treadles, 1 featherweight from 1939, a Janome Jem, MemoryCraft 10001 & a Janome serger. Do I "need"
all of these? Well, no. But I just enjoy having them.
The only sewing machine police that I know of is MY Husband!!
Chris