umm thats my definition (and webster' dictionary as well), guess yours is different
take it easy, no one is saying these guns aren't expensive (and hopefully there is quality there to justify that) BUT
to compare an off the shelf WC or NHC with a real custom from say Infinity, where every gun is made to order (on customer's specifications) is just ridiculous. let me explain, Dlask produces custom pistols, however to call their PRO model a custom would be a lie since its an off the shelf model. Also I am pretty sure, every single 1911 close to or over 2K is hand fit, so don't bother with that line of thinking.
hand fitting does not a custom item make, using your analogy (since you seem to like cars) a lot of top end cars (example: pagani huayra) are hand crafted/fitted - but THEY CAN NOT BE CALLED CUSTOM based just on that - although not mass produced like say civics, 100s of the same copies are sold. by the definition of the very word, a custom item is a one off based on the customer's specifications.
i know you aren't going to like this too much but try and remember, its simply my opinion based on observation and logic presented above - you are welcome to yours
ps: I do not own 8 1911s or even 8 guns total so you definitely win there