So, I want to make the point that there is a TREMENDOUS difference between Theory, after 1000 games, having determined that Money focused strategies are fairly dominant in the base game, and the assertion's people make to these types of requests. In particular the realization that occurs after, say, a dozen games that, WOW buying only money stomps buying actions willy-nilly, is on a very different level than a master saying, you know, after having played a tremendous number of games, I've explored most of the strategy space here and determined that Money strategies are superior to engine strategies more often than I would like.
In particular, I find it frustrating that as soon as somebody makes the important but relatively basic observation that the goal of the game is to buy victory points and that money is an efficient way of doing so the community harps on and claims that expansions are the necessary fix. No, no they are not. Base game is not solved as soon as somebody realizes that big money smithy is a good idea. The beginner's "money is always dominant" and Donald X's buy a select few actions are not the same point.
If the people asking these questions were saying "we've played the base game and realized that, though there exist exceptions made possible by cards like throne room and chapel, the majority of strategies involve buying relatively few terminals and we've played enough that we can figure out what these terminals before the game starts and what non-terminals are worth getting over silver with them" then yes, they're done with the base game, and hurray for expansions. I suspect a point like this can come well before theory's 1000 games and maybe after as few as a hundred games, the base game might feel somewhat stale. If they are bored because they've thoroughly explored game space, by all means recommend expansions.
That's not what's going on with these BM rules all post, they haven't explored game-space they don't know the exceptions, and they follow BM to the letter to a ridiculous extent (I'll take another silver rather than a festival). Unless a player seriously seems like they've figured out most of the base game it is disingenuous and wrong to confirm their fears that Big money is absolutely dominant. Remember: what you think of when you think of big money and what they think of are a world apart.