Toyota saw and took note of the success the LR Defender made when it was launched. It emulated that when designing the 250 Prados LC and GX. Women love the design as they love the Defender's. Toyota did a good job, but IMO the Defender's design is still better. Now, the confession below is just for you to ponder, but if your wife is set on the Defender, you have probably lost that battle already

.
***Confession alert now***.
I had a 2018 LC200, loved it for all the reasons we all know. Every time I saw a Defender on the road I was pulled by its design. IMO it is still the most beautiful SUV of the bunch we have today - as it is common with LR designs. They are just great on that. I finally caved in and traded my 200 (I know, I know

) in a pre-owned 2020 Defender P400 (the 6 cylinder) - at least I got a bit of the depreciation out and since the 200 almost does not depreciate the price gap was not terrible.
I drove the Defender for 2 years. The driving experience was great, power train impressive and, as you say, it felt like a well-built car (though still had rattles and cricks all over - it is definitely no 200). However, as with all LRs, I developed a close relationship with the service advisor of the dealership. Went there constantly to fix the gremlings and multiple recalls. All under warranty, so I just spent money for the multiple upgrades you can buy for the car (flaps, tow hooks, flares, etc). I got to admit, it never let me strand in the trails I took it, but, as someone said above, I was always waiting for the other shoe to drop.
FF to 2024, the warranty was expiring, and I go to the dealer and ask for a quote to extend it, because I am not crazy to own an LR without a warranty

. The best I got was $8k for a 3-year extension and 100kmiles. Nope, thanks. There ended my relationship with the Defender. Traded in for my current LC200HE - which was always my dream ring, since the previous LC - I just did not have the courage to drop $90k for it. I could not be happier with my 200. Every time I drove the Defender and saw a 200 my heart ached a bit. As people say here, even if you trade in a 200, you will eventually realize you want it back.
Now the 250 is a whole nother story and I can see why one would be tempted to compare it with the Defender. I sat in a 250, drove one and it simply did not do for me. Whining engine, flimsy plastics, 4 banger, on and on - it is simply no 200. Today, the only thing that would make me trade in the 200 is a killer deal on a 23+ LX600 (because I refuse to pay $100k for a car). I am happy it is probably not happening, because deep down I feel that if I make the same mistake and trade the 200, I will be longing for one again - even if I get an LX600 or 700. I admit, I am just a LC name-plate fanboy and that nose of the LX helps nothing too.
Back to the Defender, if your wife likes it and you trade cars every 3 to 4 years under warranty, go for it. Just have another car as a spare (for the multiple times you will have to leave the LR in the shop) and be ready to closely know your service advisor and pile up a bunch of cash when you go trade in. Like they use to say in the Defender forum when people complained = "it is an LR, you just have to accept the many issues, gremnlins, etc, it is part of the experience, and you are driving a beautiful car"

. Good luck.