a) Well, not quite. As it is, you have to work with your employer to get it fixed. If the government is responsible for populating the form correctly, then you notify them, and they go to your employer. This is the difference between disputing overtime underpayment with your boss and getting the DoL involved. I'll let you guess which is less of a headache for the average worker.
b) If you don't have a bank account, paying for tax prep services becomes more complicated. You're also probably using shadow banking services that don't allow you to import info. Have fun doing it manually.
c) Ostensibly. In practice, they all had massive issues with correctly reporting cost basis and other important figures. So even with using an exchange, you had issues to deal with (again, manually).
So, I'd say it's all quite relevant. Your quick dismissal of such concerns is a large part of the problem.
b) If you don't have a bank account, paying for tax prep services becomes more complicated. You're also probably using shadow banking services that don't allow you to import info. Have fun doing it manually.
c) Ostensibly. In practice, they all had massive issues with correctly reporting cost basis and other important figures. So even with using an exchange, you had issues to deal with (again, manually).
So, I'd say it's all quite relevant. Your quick dismissal of such concerns is a large part of the problem.