I get the exploitative angle...a lot of companies out there that DGAF about LGBTQ+ rights but will happily pretend they do to make a quick buck.
However in the case of Bond, when the actor themselves is gay surely that becomes less exploitation and more of an acknowledgement by the writers that they have a gay actor playing a new Q.
Bond is interesting since its always seen as a product of the times and I would expect certain parts to reflect that (Bond being less rapey, women not just seen as damsels being two examples that come to mind)
I guess I'm just too cynical to see it as nothing more than "woke washing". Cynicism is higher because they could have done it in Skyfall or Spectre when he actually was "new".