For me it is the only way.
There were sufficiently large periods in my life when by willpower alone I made myself “be like others” and tortured my poor eyes with that white ‘web’ / white UI abomination, for months at a time. Then sight measurements showed that the damage was done (no wonder, eh), and I reverted to black background again. Second time I tried to decrease overall color temperature extremely - was more bearable then default, but still, I could only cope for a number of months and not longer. Got measured one more time (good jobs pay for that via premium health insurance), small damage was done, but damage still. Now I measure the same as that last test - only a dozen years later…
Yes, one should “acclimatize” to proper colors - it won’t come within a couple of minutes like you say (due to different focusing). You need time to get used to even some good things.
Also I can attest that cheapo displays won’t work with dark backgrounds at all - but who in his/her sane mind will buy cheap display anyway, given that eyes aren’t replaceable yet?
My suggestion to you is to try to use DarkReader in its Light mode, perusing Sepia & Brightness sliders as you see fit. You’ll cut blue light as stated above by doing that, and your retinas will be thankful later.