Eclecticism in the Dhamma (as per AN 3.72; AN 3.65; MN 20)

> “Those who teach a Dhamma for the abandoning of passion, for the abandoning of aversion, for the abandoning of delusion — their Dhamma is well-taught”. (Ājīvaka Sutta; AN 3:72) Does this verse imply that the Theravadin tradition is sticking too much on traditional teaching, and are unwilling to accept other approaches as well? Rarely do I see monks for example, who acknowledge other approaches who aim at the removal of grees, hatred and delusion. Of course the essence of Dhamma needs to be maintained & practised, but if we take for example M20, as follows: > He should attend to another theme, apart from that one, connected with what is skillful. > > If evil, unskillful thoughts — imbued with desire, aversion, or delusion — **still** arise in the monk while he is attending to this other theme, connected with what is skillful, **he should scrutinize the drawbacks of those thoughts** > > If evil, unskillful thoughts — imbued with desire, aversion or delusion — **still** arise in the monk while he is scrutinizing the drawbacks of those thoughts, he **should pay no mind and pay no attention to those thoughts**. As he is paying no mind and paying no attention to them, those evil, unskillful thoughts are abandoned and subside. With that said, it seems that there must not necessarily be a one-way approach, but rather, if 'x' fails do 'y' or 'z'. Am I misinterpreting something? Regards