这里的no more than 是和...一样少的意思吧？

It is a grotesque misapprehension which sees in art no more than a craft comprehensible perfectly only to the craftsman.

没了解这句话，特别是“no more than a craft comprehensible perfectly” 这的意思是呢？这里的no more than 是和...一样少的意思吧？

no more than在此用作副词，= only 仅仅、只、不过是

Money is no more than our servant. 资金不过是大家的仆人。

no more than a craft comprehensible perfectly only to the craftsman.

=only a craft comprehensible perfectly only to the craftsman. 划线部分为形容词短语作后置定语：不过是只有手工匠人才能完全理解的手工艺品。