As to the "Why is that" I can think of several things:
1. The poster may well be making an honest attempt to help the op through the same evaluation process he went through, culminating on serious consideration or purchase of a Kioti.
2. The Kioti seems to be well regarded on TBN as to capabilities, servicability, and especially value.
3. So many times advice of other posters, equally convinced as to the value of their brand, revolves around two or three top contenders, to the exclusion of products from other vendors - which are too often cavalierly dismissed.
A few months ago, many posters seemed to always bring up Mahindra, or Deutz, or Massey Ferguson, etc., etc., etc. Nobody seems to be asking why they get brought up or not.
I have no dog in the fight, just a used lawn tractor which was one of several brands I considered, and I considered all the brands I could find locally. I bought mine because I felt it was the best alternative for me and was something I could afford, which I think is the point those who bring up other brands are trying to get the op to consider.
BudInTenn, congrats on the JD 5203. Although some posters dismiss it out of hand, many consider it to be a good performing low maintenance tractor with good value. Use yours safely, please.