Entirely wrong expalanations cannot be justified, because they do not help but make big harm to a language learner. I explained why. It is difficult to understand for a native English speaker that replacing a soft consonant with a consonant (usually hard) is not an approximation, that's just a replacement of one sound with two different. Like w is v and oo pronounced simulteniously, lets approximate w like voo. Or English th in think is f and s pronounced simulteniously, lets say fs instead of th - fsink.