Having entered a few multi day races training was kind of essential to avoid hating the entire experience. Seeing if I was making progress was important and trying to work out how my body was going to react and how hard I could push was part of the training. Not strictly an amateur race with a couple of Olympians and most of the top XC racers in Oz over for it.
The missus uses it a fair bit for the same reasons, last race she did she won her category.
I’m doing another 4 day one later this year with 150km of racing over 7 stages covering hill climbs, sprint laps, night rides and 45km stages. I will be training so that I can give it a good shot, enjoy it and maybe sneak in the top half of the field.
Again not amateur but with some training I could end up near the good end of my category as this year they are putting in a separate elite category.
It does seem to be a STW thing to not only not get what and why other people do things but then to try and look down on them for not conforming.