Maybe it's just me, but it really seems like you're the one projecting your personal opinions onto him here tbh :/
If Yoshi was really dead set against it, he could simply have a GM team watch progression streams and curb stomp teams that are visibly parsing. A week of high profile examples would have a hugely profound impact on people's perception of parser usage. If that wasn't enough, it's simple enough to cross reference log uploaders too, there's a vast amount of ammo in those hills.
But they choose not to do that because they've got parser usage exactly where they want it. Do it, but don't talk about it. In all honesty, given how massive this game's casual community is, the current status quo is the best compromise possible bar perhaps the addition of a discrete method of self only analysis for duties or something like that.
Yoshi tows the line to keep things as they are for good reason. Don't project your feelings onto his actions.