I get a kick out of guys who say, regardless of the issue, "I could do it..." or, "That never happened to me....," so, therefore, EVERYONE should have to do it, or be able to do it.
It all comes down to luck, and some people are just not as lucky as you are, as I say above about the guy in the fire building on the wrong channel.
And because these guys avoid a problem, doesn't mean that the system should be made more complicated than it has to. The fact that JC has all these frequencies, SPECIFICALLY designated based on the TYPE of run a company is on (and not on immediate tactical needs), and having four firemen changing radio frequencies on each run, is really ludicrous....not to mention dangerous....especially when it's totally unnecessary.
I agree there is definitely a downside to having too many frequencies. At the other end of the spectrum, I can't figure out how a town like Livingston can share Police, Fire and EMS all on one single frequency. Imagine a firefighter trying to call a mayday but he can't get through because the PD is performing a traffic stop. I can't pick up Livingston from my location but I'm curious as to how that works.