Why does it being in the EULA have anything to do with it? FD should, simply put, follow the money. They can see how many people are in the current PvE group(s), that shows what the bare-minimum demand for a PvE mode is (because those are the people who bothered to join - there are likely a lot of people who just don't want to bother with the group-joining process and just play solo, but would play in a PvE group if given the option).
Now, every one of those people in that group represents a possible future purchase (expansions, skins, etc). If FD keep telling those people they don't matter (and not even having the tools needed to handle groups of this size is such a signal), they might just as well leave. Not all of them, of course, and not all at once, but it will affect the bottom line in the end.
30k in Möbius. Total number of players +-1.6 million or so. You know what the media and general gaming communities care about? Whether it'll have space legs and atmo planets before rival games show up. You know what they don't care about? A PvE mode. It may be HUUUUUGE to a very small segment of players, but for the rest no one cares. Heck, pretty sure EvE-style 'emergent content' will draw more new blood than care be are paradise.