It's not about retiring as soon as you can, it is also about preparing for the future. Many on this board could retire immediately - but not permanently, until they build their stash to the magical 4% figure (in combination with pensions or part-time work per their plan), which it doesn't seem like you've done.
Right now, we've pointed out some potential flaws with proceeding as you've suggested as it is riskier than continuing to work until you build a stash sufficient to support yourself. It is possible her payments could be cut, she could die, or you could divorce, in which case, your assets are insufficient.
I would advise someone solely dependent on one pension the same way - run the numbers, and make sure the other person could survive if the pension earner dropped dead one day. If they can't, because they'd have reduced survivor's benefit, I'd advise to keep working until they can be self-supporting with their stash. You'd get no survivor benefits, so you're even worse off.
Honestly, I think your post below suggests a certain ostrich-like behavior, that you don't want to contemplate the possibility of bad events happening and just want a certain answer that agrees with you. But particularly with her disabled, her health is compromised and she very well could die early before you.