Looking at the injection end of an infinitly-long ideal transmission line, you can replace the effect of that in a circuit (as a two-terminal element) with a no

Looking at the injection end of an infinitly-long ideal transmission line, you can replace the effect of that in a circuit (as a two-terminal element) with a normal resistor of the same characteristic impedance. Given a shorted end at some distance in an ideal transmission line, after some number of reflections, in a DC circuit the equivalent two-terminal element will be a zero-ohm resistor. If you use a perfect matched terminator at the end of an ideal line, at all frequencies you can replace with a normal resistor of the same characteristic impedance. Basic signal integrity stuff. Am I wrong?