Yes, except that everyone else doesn't shift their schedules to accommodate you. Many people still need to work 9-5. (Or 8-8 or something in Japan...) Also, generally social events around dinner happen at something like 7pm. After dinner events might be at 8 or 9. You're likely to miss out on a lot if you're going to bed at 8 so you can get up at 4.

I’ve gotten friends out early in the morning for outdoor social events like golf, hiking, camping, etc. I play on a softball team that has games at 6 am. Heck, even some of my first dates with my wife were early in the morning. So I disagree that social events need be limited to dinner and drinks in the evening. Oh and I still go out for dinner and drinks too... just not every day and when I do I usually sleep in a bit the next day.

I really don’t understand the resistance to waking up a bit earlier in summer. Btw I don’t even consider myself a morning person really, it’s just that when I moved to a place that gets light early in the morning I naturally started waking up earlier.

All of that would apply more or less equally for a 5:30 sunrise with DST, wouldn't it? You'll miss out on a lot going to bed at 9 to get up at 5, etc.

I wouldn't get up at 5. I'd continue to get up around 8, but I would miss three hours of daylight instead of four.

Yeah, ideally you'd shift to 7am sunrise and 10:30pm sundown, that would be ideal in terms of social events and waking time.