Your friend is just a lazy parent, ignore them 😂
in England they finish school at 3pm, how could 1 hour or 2 from 3 to 8pm bedtime be too much, how ridiculous.
The best advice I read was this: if you want them to have hobbies and interests as teenager, use their time in Primary school to join and try as many sports and hobbies as you possibly can, so you can be sure at least 1 or 2 stick.
Reception was just swimming and teacher-led clubs at school, to get used to the routine the first months.
By year 3, my kids had after-school clubs every afternoon and at weekends.
They had more than enough time for homework, "chilling", kids parties, birthday parties, play dates, sleepovers. However, they also didn't get bored, didn't spend time on screen, somehow all are keen readers.
Swimming lessons were not optional, then they could try and pick anything, from football to dancing, basket, cricket, martial art, drama.
It makes weekends so much easier when they have training and competitions or shows to go to.
I know someone will come up with the lazy parent "Kids need to learn to be bored" there are more than enough time in the day for that, they have been at school for hours, they need to run around and be active, they need to let go of steam, they meet new friends, they discover something they enjoy, they learn commitment, and they are generally happier.