A 5 kyu and a 10 kyu differ by 313 Glicko rating. From 100 games the 10 kyu will win approx. 14 on average.
A 20 kyu and a 30 kyu differ by 296 Glicko rating. From 100 games the 30 kyu will win approx. 15 on average.
The frustration a 10 kyu feels when constantly losing against a 5 kyu is probably very similar to the frustration a 30 kyu feels when constantly losing against a 20 kyu.
By the way: A 69 kyu can expect to win between 3 to 4 games out of 100 games against a 25 kyu.
I’m firmly convinced that ignoring (or should I say disrespecting) differences in strength below 24 kyu is super beginner-unfriendly or even beginner-hostile. It is also super frustrating for me personally as a supporter of this site.
I also believe this to be a major blocker for growth of OGS.
(For conversion from rank to rating I used the formula from here - which I believe is correct. For the expected outcome I’m using Elo (which is good enough for this purpose I believe).)