Well its true players cap earlier nowadays but still some teams might not be able to afford 6+ level trainer and 7 level youth trainer, which end up capping players around 27, so for these teams it takes the full 12 seasons to create their 130+ TSP players.
You need some severe luck to have 3-4 downs in 3 years even with career extension trainer, but still there's the case when the same skill gets 2 or more pop downs, thats crucial in every level of play and especially for 1st division and National teams, where most of the community's attention is being placed every year.
About the player you presented he is a special case propably around 148 TSP on his peak, so he is just the exception to the rule since players like him are very rarely created by micro nations since they have very limited ATG players drafted by non-bot teams each season.
Finally, about the "random control" in pop downs I think its just fine how it is, since the same thing is happening in real life. Some players remain closer to their peak than others of the same age, for example Vince Carter who's playing at the most competitive league in the world at the age of 42 and a National Team example is Luis Scola who played in this year's World Cup with Argentina while being 40 years old and dominated younger bigs. There are some less rare cases than these two I presented with players around 36-37 not having a severe drop at their performance in the court. In contrast, a lot of NBA players end up overseas in their mid 30's since they cant compete anymore, same for players around the world moving from a competitive league to an easier one when they get older. What I am trying to say is that this "random control" you would like to change is a hidden ability of a player, like aggressiveness, that varies for each player just like in real life.
So my opinion remains the same about my suggestion and I realy think it would benefit us in varius ways, I already presented, in case it gets implemented.