Bob, I'm going to expound on some of the points you've mentioned just to share and spread the info. No intent of argument or trying to "prove you wrong."
My experience with meerschaum is limited (only 5 turkish meerschaum pipes have passed through my hand, and 2 African meerschaums.) I have heard that they can be fragile, but I personally have yet to have one break. Other fellows I know of have had issues, though, so it does seem you are dealing with a bit of luck-of-the-draw on the material.
As for the stem connection, many modern meerschaum pipes no longer use screw in tenons. I've had three screw in tenons (both africans and one turkish) and they were all...lacking. The latest greatest meerschaum technology is a push/pull delrin. In this, it operates much like a briar pipe.
Some artisans have even been experimenting with some very non-conventional methods. My other meerschaum is an H. Cor Reverse Calabash:
These also have wider airways, comparable to briar. The briar stem is on the left and the meerschaum stem on the right. The briar is countersunk, but otherwise they appear to have the same diameter hole.
A comparison of the stem thickness. My Baki stem (top) has the thickest bit in this group, but it is a good size and nowhere near as thick as the amber styled stems (those are very annoying.) The H. Cor (bottom) actually has the thinnest bit of any of my pipes. I like it very much. The middle stem is from a briar pipe.
I don't baby my meerschaum pipes. I hold them in my hand, and I take them on walks. I treat them as the tool that they are...for smoking tobacco...and I very much enjoy the smoke they provide.
I do appreciate your practical nature, Bob...I'd like to say I'm somewhat similar. In defense of that position, I'll just end this by saying my #1 smoked pipe...probably 80% of the smokes I have...is in a Missouri Meerschaum General. If all I had was corn cobs, I'd be happy...but I am glad to have other options including my Turkish meers.