I have no strong opinion either way. But I was wondering if your belief isn't motivated more by your familiarity (with those scenarios) than anything else.
Personally I would note that in those examples you mentioned you have freedom of movement, which to me seems isn't a politically unacceptable solution in the UK.
Yeah, I am familiar with those scenarios, which kind of allow those countries to benefit from EU agreements without losing too much of their independence, in comparison with other European countries.
I am also regularly in the UK, and for many people it wasn't clear what being outside EU meant regarding European companies with HQ in UK.
Having such agreements would allow a kind of win-win situation, leaving EU while allowing many of those businesses to stay in UK.
That is just a personal opinion, in any case I don't have any vote in UK matters.