Skipping through all your post save for the last bit, what makes you think I haven't done all that when I was young and didn't know any better either? It's a been there, done that, got the t-shirt experience for me.CCS, hand/bath soap works for many at B&B who have achieved good shaves from it per the posts above. Respect, given YMMV, that it does not work for you per your post above. Was surprised by the nature of this post, that came after mine, given the quality/insight of your many other comments on B&B.
Shifting us to a more fact-based discussion I've tested multiple bath soaps and found the following to be true:
See that you have lots of years of DE shaving, own a nice collection of equipment and have used many different soaps such as Arko, Palmolive stick, La Toja, Speick, Proraso, MWF, TOB and T&H. Since you like to use a wide variety of soaps why not experiment with some of the well regarded hand soaps (e.g. Yardley or Dove) and let us know how they worked for you?
- Most hand soaps can provide at least a passable shave when nothing else if available (used to travel extensively and found this out of necessity due to delayed flights or a packing omission). When nothing else is available hand soap is a great idea.
- Tallow based hand soaps (tested Ivory, Dial & Zote) provide great slickness though the lather dissipates quickly (typically saponified with sodium hydroxide vs potassium hydroxide). Was curious about Zote (thanks to experiments from other B&Bers) as it is one of the purest pieces of saponified tallow out there however the citronella smell made the experiment a one-off. These results are consistent with findings from other B&Bers. Others who use/tested different brands of bath soap, such as Yardley, have achieved better results as noted above.
- Dove Men+Care easily produces lots of thick rich lather thanks to its surfectant. Many others have posted about this. While the lather provides lots of cushion and is resilient I've found the slickness to be average compared to other shaving soaps. An additional test I posted found that the slickness could be improved by blending the Dove with Ivory.
- My experience with custom blends has shown that hand soaps can be added to the blend to create an excellent shaving soap. Specifically a small amount of Ivory enhances slickness and I've found that Dove Men+Care is an excellent superlathering ingredient at 15-20% of the mix. It helps turn a Williams and Van Der Hagen blend into something that punches well above its weight in slickness, lather qualtiy and ease of lathering.
Some of you guys take stuff too way too personally/seriously. Sorry I forgot to put a winkie emoji in there. You want to use hand soap? What do I care? But MY OPINION is, if you're using "hand soap" to shave with, then a cart is a better choice. If it isn't for you and others, cool. Makes no difference to me. But a discussion forum is just that, people posting and sharing thoughts, opinions, ideas, etc. It's not a collective hivemind. If B&B is, I'm sure a mod will dispatch of me in due time. Or, do what I do - if someone drives you a little nuts, put them on ignore.