Personally I think too many people put too much worry into what bit to use for what they are doing or what their “horse likes”. For what its worth, in my experience horses don’t like, or not like, bits of this or that variety but are taught to not like them through what someone does with their hands (which is what they really don’t like).
I agree and disagree with this statement. This will be off topic but I feel compelled to address it.
Coming from a cowboying background in the US roping is a big part of maintaining healthy cattle. Roping is a hell of a lot easier when you can maneuver a horse with one hand then rope with the other, hence the handiness of neck reining and using the seat and legs rather than steering with two hands. If you have roped much on green colts much you know! LOL
Anyhow also with my cowboying background from the west the spade bit was a huge influence. With that came the importance of fitting the bit to the horse due to his mouth conformation. I find this information(mouth conformation) to be a good indication to what bit works best on a horse, even a snaffle let alone a curb bit and most importantly a spade. Lips, bars, tongue, teeth, palate, and training level(for the short list), in my opinion, should be considered when choosing a good bit.
I agree with you in the fact that for some that doesn't apply but rather it is simply a tolerance of the riders abilities. A bit can compliment or hinder a riders communication level with his horse when used correctly or incorrectly. But I find that the snaffle "over used" with the onset of marketing of natural horsemanship, much like the rope halter. I think some have taken the thought of riding a horse in a snaffle to retrain or fix holes in a horse (which is good) to the point where they think it is the best/humane/gentlest way to ride their horse even though he is 20 yrs old and broke to death and is well beyond a snaffle.
Put a chin strap on an eggbut snaffle, and put a curb strap on an eggbut snaffle adjusted the same way as the chin strap and they will work exactly the same way.
True, but it is called a curb strap on a curb bit. But called a chin strap on a snaffle, usually no chain, but leather and tied. LOL...go figure....