There are plenty of people in this world with disposable income that waste money on products in order to have their "I told you so" moment. It sounds so illogical, but you'd be surprised how often this happens.
As for custom anything, in my experience (as with my Trues), just because it's custom doesn't mean you don't have to tweak it to final spec. In my case, when I got my Trues: I had to play around with the footbeds, take out one of the toe cap inserts they put in, change out the steel (totally out of preference), and change the laces. However, if I didn't go custom, my usual process with off the shelf retail was: trying on different sizes until I got the right length, stretching the forefoot width of the boots, punching out the spot for my pinky toes, THEN play with footbeds, change out laces, etc...etc... Not to mention, I would have to wear Bunga pads for the first 6-8 hours of skating in order to break the skates in and relieve hot spot areas, which I didn't have to do at all with my Trues.
Trues are not for everyone. Not everyone needs a custom skate. But for me, having one foot that's about 3/4 bigger than the other, they have been great, along with the perks of not having to deal with so many mods and the painful break in process.
And as I said previously, IMHO you won't need to have to make many mods at all if you have a good True fitter.