I have no idea why anyone would suggest that you not carry "+1". As far as I am concerned if your magazine is designed to carry X number of rounds in the magazine and one in the chamber then that's how you ought to carry it. I have taken my share of instruction and as a Texas licensed firearms instructor I have given my share of instruction and I always show folks, especially with 3rd Gen S&W pistols and similar decocking pistols, how to load the magazine, rack the slide, decock, then remove the magazine and load a round back in for maximum firepower.

This has nothing to do with my personal quest for firepower since I mostly carry 6 shot revolvers and sometimes 5s - but when I do carry a pistol it is loaded to the max because it is supposed to be!