Your unexamined premise is that the car lanes are natural and good, while the bike lane is a problematic imposition on them.

"Turning left from the bike lane on the right is of course impossible"... if there is a lane of fast-moving automotive traffic directly on the cyclist's left. From the cyclist's perspective, the car lane is the "inherently problematic" one.

I don't think it's fair to say either is inherently problematic, just that there is inherent conflict with different mode types. Then, imho, you ought to look at the overall social cost/benefit of each mode type and prioritize accordingly.