If we check the Weekly lottery table , we are going to indeed realized that having more tickets does not directly increased one chance of winning, but it does indirectly..
I don't really understand what you mean by directly and indirectly, but there is no doubt the more tickets you have, the more chance you have to win the lottery.
Luckily though this very week the first prize of the weekly lottery was won by a guy with 231 million tickets which got 0.34 Bitcoin and the amount you need to buy the 231 million is 0.231
The first winner had around 210 million lottery tickets and the amount you need for buying that number of tickets is 2.1 BTC.