Barring systems that require complex input, modern Japanese F2P mobile games have lengthy story content and complexity that requires as much, if not more, dedication as one would have to a traditional home console JRPGs. Just look at anything announced in this year or the last.
Sure, I do not disagree with that. Is dedication one of the features that make a jRPG a
fully fledged jRPG, though? Also, dedication is heavily distorted because of how mobile gaming business models are structured. On mobile, companies need to extract surplus from consumers through micro-transactions (as the entry fee is zero or close to zero), which typically enters the gameplay itself. Therefore, the dedication is closely linked to the business model, which does look like it is intertwined with the genre (simply, jRPGs, RTSs and puzzle games are more adequately translated to this business model unlike, say, fighting games). In sum, I think dedication and complexity are orthogonal to the genre.
For example, personally, one of the most defining characteristics of a full fledged jRPG is the sense of adventure you can find by exploring towns, fields, and dungeons. I feel this is quite lost on mobile (not saying I do not like mobile games, but they are just different experiences for the most part, and not comparable with console games), in particular in successful games that are able to earn plenty of money. This is obvious: the aim of companies is making consumers spend with the lower cost possible and, say, open-world (or explorable world-maps) are costly to produce and difficult to monetize.