Fuko left because her JAVs weren't selling anyway. Between piracy, already low margins and most of the production crew taking a big cut, only the most popular actresses like Hitomi with connections end up making a profit.
Considering she's willing to show her pussy and do some B/G and dildo insertion, I don't think she has a problem with being lewd either.
She's talking about her work with Score.
People forget that she didn't just put out JAVs, she also had work with SCORE in the US and modeling with Nadine Jensen in Germany that contributed to her success.
When COVID happened and her Visa got rejected, she was stuck in Japan with a worsening industry and had to think about a different career that didn't depend on how uncertain it is whether her Visa would be approved or not.