这样说真是很搞笑。。。如果学长号的指挥就肯定业余，那岂不是连托斯卡尼尼也业余？ash呢？
俺不认识这个人，google了一下，发现其履历其实颇为显赫：
Sylvain Cambreling (born 1948 in
Amiens, France) is a French
conductor. Trained as a
trombone player, he studied at the
Paris Conservatoire. He joined l'
Orchestre Symphonique de Lyon (OSL) as a trombonist in 1971. In 1974, he took second prize in the
International Besançon Competition for Young Conductors. His conducting debut was with the OSL in 1975, leading
Robert Schumann's
Scenes from Goethe's Faust. At the invitation of
Pierre Boulez, he began to guest-conduct the
Ensemble Intercontemporain regularly from 1976.
Cambreling was the music director of the
Théâtre de la Monnaie, Brussels from 1981-1991. He served as artistic director and general music director of the
Frankfurt Opera from 1993-1997. During his Frankfurt tenure, he encountered controversy over proposed budget cuts from the city of
Frankfurt and the director for opera and ballet, Martin Steinhoff.
[1] From 1997-2004, he served as principal guest conductor of Klangforum
Wien. Since 1999, he has been the Chief Conductor of the
SWR Sinfonieorchester Baden-Baden und Freiburg.
执掌过欧洲大城市歌剧院和SWR的人，其实也不比INBAL差多少，INBAL在Cambreling这个年龄的时候也不过如此地位吧。
至于你说的那些指挥大师，除了早期的那些（这是因为读卖的历史比NHK短得多）, 后来的也基本上都指挥过读卖。