I don't think you're letting anything go to your head, exactly. Just a bit of a general warning that while at the micros, you are getting better and better at understanding villains and their ranges and habits, but there's still a whole world of stuff to learn.

It's good that Jonathan Little gave the reasons for his advice. I'd say the next step is to examine those reasons and see if they apply to the villains you're facing. I doubt they're sophisticated enough to adjust their ranges to bet sizing, so using bet-sizing to exploit them just wont work.

However, I don't play at your tables, so if you think they are that sophisticated (which wouldn't be the population, but an individual read), then by all means, do some equity calcs and see if the ranges he's assuming villains will continue with are similar enough to the ranges you think your villains will continue with.