alternating possession rule-seems quirky

[blewthat]

trying this again in a shorter version:

why does the rule book say that arrow only switches at end of thrown in and violations by opposing team or fouls by either team do not count as end of throw in. I cannot understand why the arrow should not just change as soon as ball is handed to thrower, seems it would be a lot more straightforward.

Anyone have a good explanation?

for example: why are the rules written so that a Tech handed out to Team A while they are trying to bring ball in bounds after held ball means they will keep the arrow? or if they set an illegal screen before ball comes in, they get to keep the arrow?