Depends on your position and motivation. I myself am always reachable and read my emails day and night. I enjoy being involved with my company just as others enjoy checking their personal emails every hour.
And you're probably subconsciously aware that it's a dopamine trap[1]. Probably the greatest fallacy of our time is that just because you enjoy something equates with it's good for you (or "if it feels good do it").
I super enjoy a taco bell run at 11PM even after I've hit my TDEE. Notice how that sentence is almost identical in structure, underlying point, and absurdity, to the sentence "I enjoy checking my email at 11PM even after I've logged 8 hours that day".
[1]: https://blog.superhuman.com/how-to-stop-checking-your-email/....
Personally, I wouldn't even go that far. Some choosing to give up their personal life in exchange for always-on work life push the needle into normalization for the rest of us that DON'T choose that.
Not necessarily, but I think the crux of your question w/r/t my statement is the distinction between "workaholic" type behavior and "working harder".
Would I suggest that a company shouldn't ALLOW it's FT/exempt employees to work over, say, 45hrs/week? Hell yes! Mandated work-life balance sounds great.
This article did make me realize how chill my current boss and team are, I don’t give work a thought during off hours which is really nice.