From an Asian's perspective, a daytime flight means that I have to wake up at my normal commute hours to catch the 11:35 flight from Hong Kong to Moscow, when I should be quite alert. Using my example in 2018, the connecting flight to Helsinki landed at 20:00 (Eastern European Summer Time). I took a coach from the airport to Turku and the coach there at 22:55.
2255 EEST = 0355 HKT
I've done a daytime flight from Asia to Europe 3 times in my life:
SAS HKG-ARN 0900-1430
I had to wake up at 0430 in Hong Kong which was very difficult, and I couldn't sleep on the flight because by the time things had quieted down I was very alert. From Sweden I had a connecting flight and by the time I got to my destination airport it was midnight in Hong Kong time. I still had a 1.5 hour bus journey to get to my place of residence.
CX HKG-LHR 1230-1800
I had to leave my home in HK at 0900 so there was no time to achieve anything that day.
Arrived in the UK at 3am HK time, long queue for the e-gates, then 1 hour bus ride + walk in the dark / cold to get home. Then I had to get cleaned up and do a bit of unpacking so only got to bed at 11pm=7am HK time. Because my body was set to Hong Kong time, I only managed to sleep for 3 hours to 2am, so by the time I got to work at 9am, I was already very tired and achieved nothing that day.
If you are a tourist going straight to a hotel this flight could work.
BA BKK-LHR 1100-1830
Same as above but I stayed up all night to try and be sleepy for the flight as I was in business class, but it didn't really work as I woke up at noon UK time and it was a very long 7 hours on the ancient BA 772