It’s not obviously correct because short periods of beyond MRV volumes have been shown recently to cause delayed muscle growth for up to a week after the cessation of such high volume training. Such high volumes are highly risky to perform if you haven’t worked up to them slowly, but if you’ve gone from MEV and are approaching MRV, you’re already primed for them. You can absolutely choose to forgo them and just deload early, but choosing to carefully execute them for a week and grow during your deload week might also be a valid option. And because this option exists, it defends the idea that training is productive all the way from MEV to MRV, even if you don’t choose to exploit that entire range.