No it is not worth it, however many of our indulgence purchases are not worth it either. Is it really worth several hundreds (if not thousands) of pounds for a good seat at a concert or football match, no it is not, but the indulgence factor makes people do it because they feel pampered. A watch that costs several thousand to do what tell the time? or a £200,000 car which again does the same job as a Kia Pride, there is really no reason to spend loads but for some reason we do it and can't help ourselves.
There is a moral issue some have with using Badger hair, putting that aside I did indulge myself in a SR 3824 brush and it has not shed a single hair. It is easily the best quality brush I have. Is it worth the money, maybe since it is much cheaper than a Simpsons but I am sure I could have got a "similar" brush much cheaper.
Personally I am still mainly stuck on badger, I bought a Vulfix No.18 from Paul ages ago and the first few uses were underwhelming. I could not stand that it could not hold enough soap and I had trouble lathering, several months down the line as many uses later, sometimes I just went and made lather and threw it away just to get the brush broken in, my opinion of boar is changing.
I am not fully there yet and I can't see me throwing my badger brushes away but my eyes have been opened to the much cheaper brushes that are great performers.