Yes this is what I do currently, however, there are two issues with this.
First, sure it will wake me up on Tuesday. But it will also wake me up the following Tuesday, and the one after that.
But secondly, the main problem is that I can't set an alarm for Tuesday the 3rd of September, when I have something important that I don't forget and that justifies a screaming alarm, but it's not within the next week so choosing to repeat each Tuesday doesn't work.