EASA holds the keys
EASA holds the keys to solve the problem but they just do not bother.
The proof for this is the situation with "base training" - after more than 15 years of using the same text in JAR FCL1 and later in Part FCL they suddenly came with new interpretation of the same text.
Now, without any change in rules and after 15 years, now the same words have different meaning making free-lancers situation even more difficult by refusing to accept this base training outside an ATO.
They obviously can and they should also make a new interpretation of the "simulator availability".
This new interpretation should say that simulator is considered to be not available if the simulator operator is refusing to dry lease single session simulator for an LPC to be performed by any TRE and this session is fairly priced.
They are well aware of the monopolistic cartel anti-market practices of the simulator operators and they have an obligation to resist to it.
That would be in line with their "no less but no more" policy and with policy of fair access to market to everybody.
The problem is that they are not practicing they own policies!
It is much easier to destroy a couple of dozen pilot careers.