To be fair, I think it’s also the story (which you are free to believe or not believe as you see fit) that she had to spend a short time (a couple seconds or minutes I believe) in Purgatory. I’ll have to see if I can find the reference.
Of course, it is possible to skip purgatory; traditionally this is the privilege of martyrs and a handful of others, so it is certainly not sinful to hope and strive for it. To say that it is anything less than probable that one will have to spend some time there still strikes me as bordering on presumption.
After all, many other great saints focused on “working out salvation in fear and trembling” . Maybe they were less holy than St. Therese? That’s not implausible, as I think St. Therese traditionally never committed a mortal sin. Or maybe you and St. Therese would argue that these saints (the most prominent I think being St. Paul) were somewhat disordered in this approach? I don’t know… I’m not actually that familiar with St. Therese; maybe I should be.
If you want to dive further down the “rabbit hole”, humility is defined something along the lines as having your intellect and will in tune with the truth. If the truth happens to be that one is in the 7th mansion of holiness, there is no pride necessarily in admitting the fact. By way of example, there is zero pride in Our Lady’s proclamation that “all nations will call me blessed” - that statement is accurate.
I suspect most of us are nowhere near, however. This brings up other questions of faith and hope - humility also implies that we should focus less on our own faults and put more trust in God’s grace. Should a soul do so exclusively, and simply ignore all its past faults? I’m not so sure about this. I think it depends where you’re at.
The spiritual life is supposed to be a progression. The typical person will start out being motivated by a fear of Hell. This is good. It is a virtue. Full stop. It is also, admittedly, imperfect. The goal should be to move beyond that point. If you are beyond that point, well and good. If you are not beyond that point, it is disordered to think that you are, and you are probably being motivated by some degree of pride. I suspect most of us probably aren’t beyond that point. But you are correct to think no one can know for sure where someone else is on that journey. So perhaps I misspoke in my initial response to the OP… I’ll just leave it at that and let you respond to any of my musings…
Cheers!