Your understanding is generally good.

There is one place (that I know of) where higher than standard power is/can be of some use - and that is where you are making a connection between two devices BOTH of which can run at higher than normal power. Of course, this also makes them more prone to interfere with other devices. In a rural environment where you have, for some reason, no cable/fiber between buildings, or getting fiber between buildings is on the plate but you need network before that, a dedicated pair wireless link (preferably with both ends also using horizontal polarization, so they interfere less with normal AP traffic that tends to be vertical polarized) can be of use.

End-user computers would NOT be connecting to the link in this case.

But. Fiber beats the heck out of that all day every day. It's a temporary expedient at best, IME; I have done both.

Your understanding is generally good.

There is one place (that I know of) where higher than standard power is/can be of some use - and that is where you are making a connection between two devices BOTH of which can run at higher than normal power. Of course, this also makes them more prone to interfere with other devices. In a rural environment where you have, for some reason, no cable/fiber between buildings, or getting fiber between buildings is on the plate but you need network before that, a dedicated pair wireless link (preferably with both ends also using horizontal polarization and directional antennas, so they interfere less with normal AP traffic that tends to be vertical polarized) can be of use.

End-user computers would NOT be connecting to the link in this case.

But. Fiber beats the heck out of that all day every day. It's a temporary expedient at best, IME; I have done both.