This kind of statement (the pride bit specifically, rather than the political promotion) is increasingly common in theatres nowadays, unfortunately, as it's the industry bubble.
It's the same reason David Tennant thought it appropriate to publicly say he hopes to live in a world where Kemi Badenoch doesn't exist or at least shuts up - because that sentiment is so ridiculously common in everyday conversations in the arts industry that he would have had zero idea that everyday, reasonable people outside his bubble are having different experiences and might not agree. People inside the bubble typically believe that anyone who disagrees is a bigot by definition, so they feel very confident about sharing their views openly.
Just weeks after the DM Budweiser thing kicked off last year, I went to see Oklahoma in the West End and the set was a barn dance with lots of beer cans scattered around - they had them all as blue Bud Light cans, and it was incredibly distracting and pointed, but they obviously saw it as a kind gesture of solidarity. It's a shame because it tainted an otherwise great production.