Is anyone else noticing the seeming inconsistency between the majority "no problem with a reinstated 10-round mag limitation" opinions being voiced here and another thread that's running currently in which 3 out of 4 members stated that they carry at least one spare magazine?

Should that confuse me or not?

Is it a contradiction or an accommodation?
Yes, I know some said they carry a spare magazine because the magazine in the gun could fail...

... but I think most are carrying a spare magazine because it offers more total rounds.
Can someone help me to understand.
Maybe. Maybe not.
Perhaps you're conflating some different viewpoints that may not necessarily belong together in the minds of some others.
Me, for example ...
I'd hope to see the CA mag capacity law overturned in the pending en banc hearing in the 9th. Then, next year I want to see the SC take up the waiting case challenge against CA's new gun Roster and declare it unconstitutional (and take the microstamping law with it).
Why?
Not because I want to add any hi-cap pistols to my safe. Just because I think it would be the right thing to do for CA's people.
Do I carry a speedstrip or a spare magazine? Sure. Is it because of having "extra" ammunition on hand? Sure. Kinda.
On the other hand, that spare mag I carry may
only have 6rds in it. Maybe 12rds, for the only hi-cap pistol I own (unless it's a 10rd mag for it) ... and maybe only 7rds ... or 8rds ... or 9rds. Maybe even 10rds.
So, I'm apparently not all
that overly concerned about the "extra rounds" if I'm willing to carry a spare 6rds, instead of a
pair of 6rd spare mags.
So why, mostly? Because I've seen a primary mag in an occasional pistol experience a mag-related problem in fast and dynamic conditions.
I've also seen a primary mag experience a problem due to an unrecognized issue, like a floorplate that was unknowingly damaged, compromising the integrity of the mag and its function.
I've also seen a mag get unintentionally dropped if the mag catch gets operated during a chaotic moment.
So, being able to address these mag-involved issues by having a spare mag close at hand can be downright handy ... even if not specifically for the "extra capacity".
All of that said, do I ever
not carry a spare mag? Sure.
Consistent? For my way of thinking,
yes, but then it has more to do with the "consistency" of listening to my inner voice and experience guiding me for deciding on a priority that may have changed since last time.

And may change yet again the next time.
I don't see ammo capacity being the "answer" to all gun problems any more than I see guns being the "answer" to all problems.
Spare ammunition is handy if you need spare ammunition.
A spare magazine - or
magazines - may be handy if you need them ... and/or the ammunition they may contain.
Then again, all the magazines and ammunition someone may be able to trundle around with on their person may not prove particularly helpful.
Suit yourself. You're the one who has to try and live with the consequences of your decision.
I'm no longer having to consider the potential of invoking peace officer powers off-duty and inserting myself into the middle of some fracas. Trouble is going to have to work harder to
find me, because I'm no longer going to be looking to
find it. (And I still have to keep my career-honed "radar" looking for trouble on the horizon over which I may trip

).
No right or wrong "answer" ... unless you carry a gun for your employment and are given the "answer" by your employer.