Select and Mask doesn't have marquee tools?

It used to be called "refine edge" and that's a better description of what it actually does. The implication is that the selection already exists, made elsewhere. An addition to the existing tools, not the primary selection tool.

I can see why it would make sense to collect all the selection tools in one place. But keep in mind that almost everything in Photoshop is a selection tool of some sort, right down to the pen tool and the text tool. Selection and masking is a very big part of any normal workflow - so in effect that would almost become a Photoshop inside Photoshop. Maybe that's where it's headed eventually, like an ACR of masking.

If you need to use marquee tools to adjust a finished selection that can easily be done either in Quick Mask mode, or by turning on the mask channel so that you get the rubylith overlay.

No it doesn't have those tools. The select and mask was designed to "quickly" make and refine selections that might have hard to select areas like hair. If you are going in and using the marquee tool to make precise selections, the I would suggest you use the tool either after or before you use the mask and select. Frankly, most of the time, I get frustrated with mask and select and use other methods like channel pulling or just going in with the pen tool, or polygon lasso tool to make my selections. I guess some people love the feature and it's good for some things, but not all.