I think it's a personal decision, as long as she sells she can get away with being modest
In her case, my opinion (but it's just an opinion) is that's Bambina that "slows her".
What makes me think so? I'll just put some sentences (sorry for the bad english, I do not want to be "rough").
She said in a recent delivery that she does not even know the outfits before the shooting day. And this was quite a big surprise for the audience. (I still partially doubt about it, because some times what she says is not logical, but at least that's what she said).
She complained a little bit, on an instagram story, that she sometimes gets interesting proposals but that she has no say and has to wait "patiently" for the agency to come back to her.
And she wrote couple times that she does not really have NG, but just follows the orders from the script. Last time was last night - japan time - (it was around foot fetish).
So at the end she seems to be more someone "doing what she is ordered to" than someone who manages herself.
This and the fact that her "normal character (=gets drunk regularly and loves watching JAV)" is not really her "bambina character" ("pure maiden") makes me think so. She even had to remove all the pics she had posted of her drinking beer... and there are other examples that I cannot really talk about here.
But at the end , and coming back to your sentence: as long as she sells enough (even if sales have been a little bit meh since last year), Bambina will not "spoil" her. Asami said several times that she wants 100 DVDs and do gravure until she is at least 30, so they have a lot of time....need to manage her for the 7 years to come...