“Apparently you have never worked with wifi — ever notice that wifi drops out when you talk on your wireless phone?”
If that’s your basic understanding o frequencies, you don’t know much.
And I understand the interactions of devices. I have spent many many hours (weeks and months) in an OATS (Google it) and understand very well how devices interfere with each other... and the solutions for preventing the interaction.
Wifi is a marvel and very impressive. But it too is vulnerable. Just that your average user can't see it — the number of dropped packets and retries and resends or error corrections. The fact that the average user doesn't see it is a marvel in itself. The only thing visible might be that it slows down. Not that familiar with the wifi protocol but it is probably like Ethernet — there is some level of error detection and if an error is detected the target (recipient) asks that the packet is resent.
PS. OATS — open area test site for EMC (electro-magnetic-compatibility).