LordCrash A whole bunch of reasons I would assume: being able to advertise in ways and places that would not necessarily be legal if you're promoting uncensored content, being able to market to a substantially larger user base who has already lived with and grown accustomed to censored content, not limiting yourself to only users who will want to jump through the extra hoops to use a VPN and hope their payments will be accepted by payment brokers outside the country (and who would already be doing that anyway), to not do something of questionable legality (in Japan) or anger anyone who might otherwise be able to put a stop to any long-term plans to produce SLR JAV, to massively increase the video quantity available on the .jp site and be far more competitive in a market primarily centered on PPV scenes, etc.
If anything I'm hoping that this will put the pressure on more JAV VR studios to upgrade their mostly-ancient rigs. I can usually look past the censorship/pixilation myself, but I can't really look past the 4k visuals that look straight out of 2019.