So what is the worry of having some oil being recirculated into the intake providing a little extra lube to the valves and piston walls
It would also at some point raise the octane of the fuel mix since its flashpoint is significantly higher than ethanol and gasoline
Actually, oil in the air/fuel mixture lowers the octane (read the article in the original post) and it's during WOT, when the PCV valve system is not functioning due to no vacuum to suck the gases from the crankcase that this becomes a problem.
During WOT, the oil from the blow-by in the crankcase is sucked into the intake directly and this is when you don't want oil coming into your air intake, reducing the octane level of your air/fuel mixture and causing detonation at the worst possible time.. Part throttle is not an issue as the oil goes through the regular PCV part of the system, which does some oil separation on it's own. Also, part throttle the mixture is generally not as "volitile" and prone to detonation.
I guess it really depends how hard you drive your truck, and who much detonation is an issue. If you are at "part throttle" 99.9% of the time, then the catch can is of little value because even though you may still have some boost, your mixture is not going to be as prone to detonation.
But, if you are opening up your engine all the time and especially if you have a fairly heavily modified engine (possibly bigger turbos, more aggressive tuning), then detonation does become a bigger issue and a catch can almost becomes a must. And those guys would be tinkering with their engines all the time, so draining a catch can every couple of months would be no big deal.
For most moderate drivers on a fairly bone stock engine, and who is NOT into maintaining their motor, a catch can is something to be avoided; if they are finding any detonation issues, they can either buy a higher grade of fuel or let the PCM pull out the timing and reduce their power.
For more aggressive drivers who have a modified engine and running an aggressive tune, a catch can makes a lot of sense. Maybe even water-methonal injection.