Obviously, MS does want a bigger part of the mobile pie. As far as I'm concerned though, W10M is now on the reserve bench. It's just there. MS' UWP vision just isn't viable without a low-cost, small form factor, touch device capability, so MS has no choice but to keep W10M moving along, and they will do that for as long as they remain in the personal computing business. Rather than pushing W10M, MS will instead be pushing UWP, which may or may not relate to phones. If the fruits of those efforts at some point trickle down to W10M, then all the better for it... if that trickle at some point becomes a stream, then MS can eventually bring W10M back into the game... until then... reserve bench. That's where this notion of "not being interested in market share" comes from.
That's how I see it.
And you have a right to see it that way, and you make some very good points. Let's just say on some aspects, we can agree to disagree.
If they are saying they "don't care" about market share, how ever it's worded, in all and all, that would be 100% BS. Sure there is no point to "chase" iOS or Android but, to be successful, they NEED to gain a larger part of that pie, sitting at 2-4%, as it's a nice achievement (for a new phone) but, after 5-7 years now, it's a disappointment and does not do much for their bottom line.
Anything about it, Windows 10 to Windows 10 Phone, NEEDS to be successful or I honestly don't think we will see a Next version. Referring to Windows 10 phone only, Windows 10 on desktop will be successful, as something like 90-95% of the computers in the world run Windows, it cant fail but, Windows 10 phone can.