Because pyramiding is not just an external thing. It has internal affects as well, especially combined with a poor and readily available captive diet.There are tortoises in the wild with pyramiding, so why do you care if you have a tortoise that pyramids a little like some do in the wild? The reason many of us care is because we all like the look of a smooth shinny carapaces and the pyramiding is a sign of disfigurement or abnormalities. We are proud of our tortoises and want them to look kick ***, that's why we care.
I have not yet mastered the closed enclosure set-up as well as some of you, I can't seem to get the humidity high enough and still have dry substrate. My enclosure is a work in progress and I'm about to transfer my 0.2 baby platynota to a 100 gallon aquarium. Once a month I rub a little pure coconut oil on the top of their carapace to prevent them looking dry and flaky.
Oh, btw, congrats on the platynota, they are a very nice species!