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Antenna tuning and L/C matching

I see there are already a few questions asked wether it is better to physcally tune the antenna for said frequency and impedance or use a matching network. It seems the conscenus is often the physical way is prefered firstly. But id like to know exactly why. From my current understanding, the matching network will infact reduce any reflective power due to mismatching, logically then that "not-reflected-power" would lead to more power to the antenna and hence more power to the air? I suspect just because more power is going to the antenna, it is probably wasted in some form and not 100% propagated, so in essence matching a mismatch will always help partly, but just not as if the antenna is actually tuned for that frequency.

So id like to know if im on the right track here, and if so, what actally happens to that wasted power that might not get transmitted to free-space (even if this antenna had no real resistance, would the loss maybe in the form of something funny going on in the near-feilds to prevent propagation?)