I mean, I won't be the first to note that the incredible success she has with Ladies is yet to translate to Men. She has had a number of upcoming talents among Junior Men in the past years and does so now, but none has made it to seniors as of yet. She has coached Voronov for a time, but that was a few seasons ago and the success, while there was some, wasn't what Shoma would aspire to. And there's Moris, who's not showing much of impressive results. Then there's the fact that her coaching style is well-known to rely mainly on an extreme amount of repitions, working great for young healthy bodies but posing problems for a bit older athletes with recurring injuries. Which to me makes her an unlikely choice for a senior athlete in Men's divison who has spent most of the last season skating injured.
I don't think it's completely out of the question, of course, just very surprising.
I would say that she just had no time to get any success in men (specially considering the average russian men). Considering their own level, Voronov and Morisi showed quite an improvement, for example.
As for her coaching style, your description is mostly based on rumours.