Koach Tehetera Adif proves that you have to be very wary of bring Mattir something, and only if you are 100% sure of it can you do so. And so, it proves the opposite of how the קלים use it.
n0mesora, are you trying to trick people here? The Gemara is describing the shock of Rav Mesharshia at the leniency of Ravina. In his shock he exclaimed, “You allowed this? Hopefully you’ll allow Chelev, too!”
If you seriously think you can take this ‘either way’, I’ll have to re-read anything you quoted here previously.