Theoretically yes, but there a myriad reasons why you might not have a perfectly planned workout to execute.

With high-effort intervals as well, since the goal is to be near-max of effort for the final intervals, the reality is that it's very easy to overdo it despite best planning.

Even if its something as subtle as going a bit too long on yesterday's easy effort workout, you may have to dig slightly too deep to finish that interval workout as planned. Sure, it won't kill you, but it's likely better to err on the easy/safe side, and focus on the LONG term picture where you'll be physically AND mentally ready to do more and more intervals for weeks/months at a time.

I've actually found that there's nothing heroic or even beneficial in terms of mental training by forcing myself to 'finish' my planned hammerfest workouts. It's just macho BS. It's almost always much better to pull it back before you blow yourself up, and do it again but better the next time around. I've overtrained enough times now that I've been forced to recognized that my genetic potential doesn't allow me to train like an elite, and that crushingly hard workouts are way overrated compared to a nice, calm but progressive training load over months/years.

THAT SAID - even with this mindset, in the pool, this means I'm usually going all-out on interval day, literally pulling through the final sets even if the time is going to crap. The injury risk is less, and I find i actually benefit a lot when I push into that swim red-zone. I def don't do that for running (not even close) and even biking despite the less impact. (I've overtrained the bike as well.)