Because, in that case, the lawyer’s own actions are the issue.
Titles he recorded before he was disbarred are not invalid because he misrepresented himself. Those who acted in good faith based on his lies are not at fault.
In the case of the person calling himself “Obama”, almost all of his actions have been carried out by civil officers of the United States, and THEIR actions are not invalidated by whatever “Obama” has done or not done.
Anything passed along to us through someone who has taken the oath of office in Article six is certainly voidable. Their oath of office requires that they support this Constitution. Failing to ensure that the Twentieth amendment, section three was complied with makes them part of the reason why we have a usurpation. Ignoring the Constitution is not supporting it.
Another thing about your contention that is not correct is based upon the Fourteenth amendment's requirement that we are all equal under the law and that laws apply equally to everyone. How would this be applied in the case of a man accused of having sex with a minor who he assumed was of legal age? Everyone in the bar assumed that she was of legal age. She represented herself as such. The bartender facing charges of serving alcohol to a minor was fooled as well by her fake ID. Would this defense of yours save these folks from being sent to jail? If your contention applies anywhere at all doesn't it have to apply everywhere to be considered an equally enforced legal concept?
There is case law to show that these types of occurrences have resulted in jail time for those who "assumed" someone was who she was.
Thank you. Interesting.