real wasabi root is a bitch to farm, so if you buy wasabi paste and it’s not expensive, or if someone serves you more than a tiny dollop of it, it’s probably actually horseradish paste with wasabi root extract.
not that it matters, clearly people enjoy the horseradish paste.
and even then you can at least buy some tippex to censor things, and if you want to get advanced i’m sure there are products that straight up remove the ink from the paper.
I know there are specific extra hard erasers for removing pen ink