Quote" Why do you need to do single engine charter to be able to do multiengine charter? What difference does it make if your multi hours a logged up by doing IFR teaching? "end quote.
Either you do not know what the difference is or you do not think it is a justified attitude.
If it makes you happy to get all worked up over it great, but, irrespective of what you think, it is the opinion of just about every Charter/Low capacity RPT orgainisation, why do you think that is ?.
Best advice, deal with it, go do some single engine remote locality charter, and find out how much you didn't need to learn from that experience, or continue moaning about it on pprune.
I have done both, there is a very very big difference between the two worlds.