A lot of societies are set up to accommodate that society's dumbest members, and tourists, for most everyday tasks.
Outside of the workplace and my hobbies, I can't remember the last time someone asked me to read more than a few words, write anything at all, or do any maths more complicated than "the 12:20 train is 10 minutes late"
Personally I would say it's not respectful to a society to move there and not make a decent effort to learn the language - but I have no doubt a person could survive with only basic skills, if their workplace worked in their native language and they had an ethnic enclave as a support network.
I have B1 German, finally managing an official certification at the start of this year despite living here since the end of summer of 2018.
As societies require accommodations for idiots, I found it so easy to get by with the German I did know that I kept incorrectly assuming I was at B1 level for years and years.
B1 requires being able to read headlines and a few paragraphs of a typical newspapers, to briefly plan events, that kind of thing; not just the ingredients and cooking instructions on the back of food packaging and know how much money to hand over to the cashier.
Given what I still can't do, I can totally understand why so many job openings I see at the moment require B2 or C1:
My grammar is still terrible, and my grasp of accents is still heavily biased towards a handful of podcasts and youtube channels, and being surprised by the conversation topic can still easily confuse me, as I found out on Sunday when someone's classic motorbike broke down outside my house and they asked to borrow a 19mm spanner.
Outside of the workplace and my hobbies, I can't remember the last time someone asked me to read more than a few words, write anything at all, or do any maths more complicated than "the 12:20 train is 10 minutes late"
Personally I would say it's not respectful to a society to move there and not make a decent effort to learn the language - but I have no doubt a person could survive with only basic skills, if their workplace worked in their native language and they had an ethnic enclave as a support network.