The need for a patent license prevents, delays, or slows the idea from being executed upon by adding a cost to it, and the execution is the valuable part.
The best patents commanded a high price even before there were patent licensing businesses. In fact, now the amount you can make off of a great patent is higher because the demand is.
It's really only because they occasionally sue that people complain, but without lawsuits their business model wouldn't work.
There is always a toll--if there is a patent. Why would I pat someone on the back for licensing me something that was once free, until a BS patent was created and sold to an extortionist?
>> lowering the barrier to entry
I think the difference is that I am stepping outside of the current system to make my point, and you're saying patent trolls and licensing improve the current system. It seems clear to me fees in general are disincentives. I agree with you that a lower fee is a lower disincentive, but still more of a disincentive than no fee at all.
Individuals without defensive patent portfolios are at a severe disadvantage in the current environment.
Without the current sham system, there is no "toll for patents I didn't register." This is not to say that there should be no system--only that the system is broken and does not accomplish its aims effectively.
I would contend the system did not start going off the rails until more recently, anyhow.
Patents are intended to spur innovation, but when there is no production, the greater good suffers.