"Why do you think Capcom, one of the most qualified game companies for Counterculture, created a fundamentally 3D game franchise regarding graphics?"
Capcom is a business, therefore if they think it will sell well, they will produce it in order to make a profit. In the case of the Resident Evil series, they were obviously not wrong.
I'm not a fan of RE myself, but I can understand Capcom's decision from a business perspective. Prior to RE, Capcom was best known for Street Fighter, Darkstalkers, etc. (plus the Marvel crossovers), all of which was in 2D at the time, so no one could accuse 90s Capcom of neglecting 2D. But this meant most pre-RE Capcom fans were fighting game fans (like myself), and Capcom might have considered it commercially prudent to diversify its customer base. As far as I remember, this was exactly what happened: there were few cases of SF etc. fans also trying RE out of sheer loyalty to Capcom, but many cases of prior non-fans becoming Capcom fans via RE, and then later also trying out MvC2 (due to Jill Valentine being in it) and from there gradually getting to know SF etc..