What is a B/W profile? A B/W preset?
There are profiles and there are presets and they differ in behavior and usage.
If the sliders move, it's a preset. If the sliders don't move, it's a profile. And they are separated in the browser,
partially for this reason.
There are two types of profiles now: DCPs and the newer XMP-based ones. In terms of the newer XMP based profiles, they specify a base DCP. For the vast majority of them, including those made by third parties, that base DCP will be Adobe Standard. So the first consideration is that XMP Profiles are built on top of DCPs and extend the DCP profile. On top of the base DCP, there is an optional Look Up Table/LUT. XMP-based profile can also specify many but not all of the options from the GUI we use. There are some reasons why these profiles do not move corresponding sliders. For example, a preset for vignetting adds just a vignette and do nothing else, the other adjustments are not altered.
There are other presets that define the total look of your image, they alter multiple sliders, and could in theory alter every slider, setting some to zero or otherwise. The problem comes about if you've spent time working on an image, then apply such a preset; all the work you did gets undone and replaced by this preset.
Say you have a profile that affects exposure for under exposed images. You can use them and then alter exposure for one image that needs that exposure tweak and more if set in said profile. The profile's exposure is added or subtracted from your setting. This allows any exposure that is part of the profile's look to be applied without trashing your setting. With XMP profiles, everything is set to zero. But think of the new profiles this way; they don't actually leave the sliders at zero even though they appear that way, they change the meaning of zero.
Here's where the differences in a preset and a profile get interesting. Imagine you have three images with differing exposures: one is ideal, one is under exposed by a stop and the third is over exposed by 1 stop.
Now suppose you manually adjust each with the Exposure Slider so they appear the same. And you'd see three differing Exposure slider settings or course. Now suppose you're using the older presets such it's set to +1 and (and perhaps other settings to alter the image) to all three images instead. Each gets the same setting which isn't ideal; only one would appear as you wish. All three show a difference in the Exposure slider of course. So this preset isn't what the creator would desire in this case use on three differing exposured images.
Now from presets to Profiles
Now suppose you use a profile that has a +1 exposure setting baked into it. Yes, all three images now appear differently due to that +1 exposure in the profile but they have the same exposure slider values as before the profile was applied! Again, the new profiles don't actually leave the sliders at zero, they change what zero means. Now using the example above, if you've had to increase your exposure for under exposure image, decrease the other image, that edit is still respected, but the profile's exposure is added or subtracted from your new manual setting. This allows any exposure that is part of the profile's look to be applied without altering your Exposure slider settings. You now switch to another profile after altering the exposure settings for the three images above, that Exposure setting for all three images is still honored. You'd see +1, -1 and zero for exposure.