What the "people who want to put bike lanes on 25 mph streets" say is not at issue here as there is nobody here who advocates this and there are few 25mph streets in Portland with bike lanes. The issue is with you, and how you insist on describing Portland as something it is not without any direct experience.
The way I see the proposals, the legally deliminated exceptions pretty much cover anything. Why are you against this? Even if the law stated that you could "ride on the roadway as if no bike lane were striped," the part of the law where you want to ride "as far to the right as practical" would put you against the bike lane anyway. Are you saying you like to ride in front of a line of cars for no reason what-so-ever, even when you can move over to the right a bit and let everyone, including yourself have an easier time at travel? The exceptions carve out every single reason for leaving the lane I can think of and really effectively nullify the mandatory bike lane rule.
Besides, changing a law is an incremental thing, and the proposed wording is better than the current wording.
If it's on the books, it's enforceable.
Sure, but my point is that it is not enforced nor mentioned in any official documentation.
BR