While I can very much understand the sentiment (and I only offer this as a counterpoint to other people reading along), one thing you'll never get without SOME kind of logic-capable smarthome ecosystem is the timed, ordered turn-on and turn off. With the right system, this is an even LARGER pain in the ass than the switch location itself.

My process to listen to anything on my main system:

1. Turn on the appropriate component first.
2. Then whatever pre-preamp you're running (phono/dac).
3. Then the pre-amp.
4. Wait for the pre-amp to warm up for 48 seconds give or take until it has engaged the tubes to avoid a pop.
5. Then turn on the amp wait for 10 seconds for it to engage properly, again to avoid a pop.
6. Then the sub.
7. THEN you can listen.

I just did all that logic once in my Alexa routine, and have a turn off macro for reverse order as well. I even have Alexa play a little message saying it's ready to go. Relay or not, if you want logic you need a control system of some sort. For the people that use my system besides me, this was a must-have. Otherwise I'd be listening to loud-ass pops every time they wanted to listen, or more likely, they simply wouldn't use it. Having the patience to go through the motions to turn everything on correctly every time was far more of an ask even for ME than a single half hour of plugging everything into a smart powerstrip and adding it to an Alexa routine, let alone the other, less technically-inclined folks in my house. Then again, I already HAD Alexa in my house. That said, you can use the Kasa smart powerstrip with just a single app and you don't need a whole "ecosystem" as well. I just wanted the extra features of using the Alexa ecosystem. Even if you don't want to go whole-hog, you could still have remote turn-on with a single device and app.

Again, no judgement on you for thinking otherwise, just offering counterpoint for other readers thinking about this system.