Why is Laphroaig 40 more expensive than Black Label and a bottle of Aldi Scotch is cheaper still? They're all just whiskey.
If you can tell the difference then you'll appreciate a better playing and better sounding instrument. If you can't tell the difference will probably be unimportant to you, hence all the questions asking how people can spend so much on "expensive" basses. To me there is a definite improvement in feel, playability and sound in the custom made basses I've owned over production line basses I've tried. Even between them. You really could hear the difference between my Wal and Lakland when recording, and the Wal sounded so much better. On a gig the difference swung the other way.
In my case I currently have 2 £3K basses that sound and play much better than my £1K bass. I can't afford these prices so I did the only sensible thing. I bought them both from their original owners at much less than the RRP. I'd love to have a £300 bass that felt and sounded this good, but so far (and I do look) I haven't found one.