Hypothetically, let's say you can deadlift 455 w/ straps, but only 365 without. I'm all for training grip and I do so regularly, but I'm not going to limit my lifts because my grip can't keep up w/ my legs, back, etc. Yes, ideally, I'd love to pull 455 strap free, but until I'm able to catch my grip strength up to the rest of my body, I'm going to use straps for my heavy sets.
In short, I disagree w/ what you said. P.S. By your rationale, advocating the use of wrist supporters is advocating weak wrists. You've got to stay consistent, at the very least.
I'm sure there are many in the S&P forum that would disagree w/ me on this issue, but that's the way I've always seen it and always will until the day I can hang onto whatever I can lift w/o the extra help.