fiber internet installation

Fiber optic is good  but not inside the house in most cases 

inside cat 6 Ethernet cable.

The issue of noise is wifi + AC power.  You want to avoid putting it in the rack with your audio gear, for sure. The AC power issue can be mitigated with an iFi low noise wall adapter or putting it on it's own low noise power conditioner like a Furman PST-8.  

If you are running Ethernet, consider an Ethernet isolator like this near your streamer.  Especially good for long runs as it will help protect from common mode surges. 

@mitch2 greatly appreciate the informative response, especially with the YT link. Maybe I should have more shame in saying this, but I will absolutely destroy anything I try to repair or modify. “Handy” would never be associated with my name.

We typically don’t have basements in Arizona, but we do have attics - I just don’t want to be on a home blooper reel. I had forgotten about the micro-cable raceways. I actually use some for my speaker cables which aren’t too noticeable. Thank you again for the guidance!

Why fiber optic doesn’t work in most of the houses? 
@audioman58 

I have Century Link fiber optic service. The optical interface unit is by the exterior breaker box. I paid an electrician to run a Cat6E cable to a jack behind my system. The modem is on a shelf next to the jack beneath to TV. Everything is hard wired. 

There are no wireless signals for the modem signal to interfere with. The lion's share of TV we watch is from a roof mounted antenna. Or we stream video or internet radio hardwired.

When the house was built someone plumber taped a 2 inch PVC pipe along the stud with inlets behind the TV and down low for components. TV cables are hidden.