I noticed the solidarity
The arrogance on display in that article is astounding btw ... "the UK does seem to have a problematic relationship with culture and the arts." = uncultured philistine Leave voters with no idea what they're destroying. This is the subtext of much of what I'm reading and it stinks.
I think you've got the wrong end of the stick. I don't really think it's about uncultured Leave voters having no idea what they're destroying as in they're indifferent to or even anti-culture.
I think there's a broader point to be made about Leave voters not knowing what they were destroying, because they'd been sold a pig in a poke, told we would 'take back control of our borders' and all those Europeans who come over here to 'take our jobs' would go home and stop coming.
Except the Leave campaigns didn't mention or glossed over the fact that EU migrants were doing some jobs that Brits don't want to do, like working outdoors in crappy weather doing back-breaking work in the agricultural sector or working as low-paid carers on zero-hours contracts, or doing things like working as nurses and doctors and teachers and keeping our hospitals and schools etc functioning.
One example is how many fishermen got persuaded to vote Leave to 'save our fishing industry' then got fucked over. That's not to say they were bad or wicked or stupid, they were manipulated by people who didn't actually have their best interests at heart running a very well-funded and sophisticated campaign.
So I don't think it's about Leave voters being uncultured philistines, it's about musicians, actors, artists, crew, etc, being unwitting 'bycatch,' to extend the fishing analogy.
Leave campaigners - by which I mainly mean those pulling the strings - and government, wanted to stop EU citizens from having freedom of movement to migrate here, work here, settle here.
I don't think the impact on the arts and culture sector and the short-term nature of many jobs in the sector, wasn't really on their radar.
The noise about potential adverse impact to be avoided was mostly about things like fishing, automotive industries, and impact on banking/finance sector, protecting jobs in those sectors. And of course there were concerns about the potential adverse impact on tourism (airlines and big international hotel chains worried about bottom lines being hurt). And academia raised concerned about the potential impact on universities if EU academics couldn't get work permits, and if Brexit put off lots EU students from studying in the UK and universities' revenues were hit.
But concerns were always dismissed with 'You're just a Remoaner' 'Take back control' 'Control our borders' "Sovereignty' and 'You lost, get over it'. Or some Leavers thought a few job losses and a bit of damage to the economy was a price worth paying.
I do think some people didn't really give a shit about arts and culture, but again, they were the people in power, and the people pulling their strings.
I don't really think arts and culture have had decent champions in government since Ed Vaizey's tenure as a minister ended and George Osborne left office. For all their flaws due to being Conservatives, they were two politicians who were arguably the most supportive of the sector amongst their peers (as much as any could be in the austerity era that Osborne himself presided over).
Like the article mentions, an afterthought.