Yeah, I'd definitely say the Jazz got more than they deserved. They undeniably made conscious decisions that artificially deflated the team record. It's not quite the same thing, but complaining about the Jazz only tanking to 9 is kinda like complaining about not winning enough when you're trying to win. The Jazz were not the only team trying to lose on purpose. Just as there are teams in a better position to win, there were teams in a better position to lose. By virtue of having Lauri Markannen (among others) the Jazz were not able to be one of the worst teams in the league. The reason why we were in the 9 spot is not because the Jazz tried to win and were anti tank.
To echo your last point, it would have to take even more purposeful actions to lose on purpose to get even higher. Now I think the Jazz could have been quicker to execute on b)....but realistically speaking the Jazz did not have higher odds because they had Lauri Markannen. If you wanted a higher pick and that is what's most important, he is the man standing in the way. While it's easy to feel envious of a team with a higher draft position, having Lauri Markannen is also a position to be envied. He is the man most responsible for the Jazz not being higher in the draft, but I am very happy with the tradeoff he's given us.