That’s a shame.
I was hoping that setting the event at the instance level might generate one trace file in the background_dump_dest but, like event 10046, it generates one trace file per session in user_dump_dest. I should have expected that, but I suppose my optimism blinded me.
It doesn’t make event 10132 unusable though, but you’re going to have a lot of trace files to deal with on most systems.