I think the problem in both your situation and the text you are quoting is that the daily scrum somehow turned into a competition who has completed the most tickets. Is the quantity of the tickets your developers deliver the most important metric on which they are judged/evaluated ? without taking into account the difficulty/amount of work of the ticket ?

The daily scrum should not be a competition but a (short) meeting where everyone tells what they are doing at the moment, what problems they encounter and see/discuss if they can help each other.

Apart from that, scrum should not be treated as scripture. There is nothing wrong with the manager assigning certain tasks/tickets to the most senior/appropriate persons.