Players retired too early after release?

Has anyone noticed there are more and more young managers at the age of 30-34 all over the world? Players got released at 30/31 and if no clubs sign them within months, they immediately retire and some become managers at clubs. They just don't have the patience to wait for offers from lower leagues, which makes the game have far less veteran players after two seasons compared to the start.

I just went on holiday for two years and found that more and more players retired at 31-33 when they still had it. Some of them never slipped down the leagues and decided to retire at their clubs. I believe they weren't retired due to injury because Christoph Metzelder had already declared to retire at 32. What do you think about it?

Christoph Metzelder 32

Gomes 32

Tomas Rosicky 32

http://postimage.org/image/n5r695te3

http://postimage.org/image/ysgh60oin

Gabriel Milito 32

http://postimage.org/image/5iek6ora7

http://postimage.org/image/fv0usrktb

Marjan Markovic 31

http://postimage.org/image/oxtxdj9y7

http://postimage.org/image/86oien0o9

Cristian Chivu 32

http://postimage.org/image/eo9af9v63

http://postimage.org/image/7iyyhetd5