Agreed, totally illogical!!! and that is why I am in this crazy hobby...
FWIW...My journey started with just stock SU-1 to run its I2S output to Holo Spring DAC input, after SU-1 KTE became available, while debating whether to try it, I decided to give the LPS-1 a try since I happened to have one, and the end result was very positive, so I finished up the rest of the mod by fabricating a blank plate in place of original AC input plate, and stayed with this configuration for a couple weeks. The next mod was to replace the main board 3.3VDC voltage regulator because all but one device on the main board receive 3.3VDC from this regulator, and the stock regulator has much higher noise and PSRR than the new regulator (based on the description from SU-1 KTE, is not included), where this regulator is limiting the result from the power supply mod, and along the way, I also replaced the 5 large electrolytic caps, the end result as expected is another step up in overall SQ. Finally, I put in the new Iso Regen + LPS-1, thinking there might not be much left to improve, and I could end up using that 30 day return policy, but the result prove me wrong once again, this unit will NOT be returned. So, yes, it is crazy.