The Modern Benoni MIGHT be the right choice for players with a certain playing style, and quite unsuitable for others. If I think that it could fit the players style, then would suggest it, but not insist if the player said no. And- needless to say, if a student announced to me that he wants to play the Budapest, I would reply "fine- good luck with it, and don't expect any help".
Actually you can meet players rated over 2000 FIDE, who don't have any "playing style" yet...
Most of the credits for WGM Kouvatsou belong to her first trainer, NM Kostas Tsarouhas, and her later trainer, IM Zahari Zahariev. Botsari had a second coach, IM Gavrilakis, which did the most openings' work with her. I was mostly working as a trainer with boys, and several of them became FIDE titled players, but only one of them (GM Spiros Kapnisis) is currently active. I have also coached most of the members of the current Greek National Team (all of them GM's), but of course coaching is much easier than individual training...
I've come to the conclusion a while ago that the Budapest is an inferior alternative to other openings that generate a somewhat similar style of play without giving white static and even dynamic advantages he gets to keep. I don't mind if white has some positional advantage as long as I have enough active play to neutralize it.
I was motivated by the question largely because I seem to be drawing more with the Nimzo-Indian while with the Dutch I risk dangerous sidelines:
Then again I have improvised nicely with decent results:
But not all white replies for the Dutch are for everyone though.
I've seen games where both white and black have great wins in the Modern Benoni. Karpov's handling against it and Topalov's handling of it though are truly legendary.