I wouldn't read any conspiracy theory into it - it's just a source of profit for Meander Tours ( such an ironic name ) and some pioneers , in most cases well meaning , who do the tours.
I always resisted going on one , even though our congregation did a couple of tours to which I was invited. I love the British museum and I've been there on my own or with my family a few times but the thought of dressing up in my meeting clothes and going on an "official" tour with a bunch of JWs never really appealed.