30 arrests a day for something in a population of seventy million people, a large proportion of whom are online in some way, is not that much.
And it's not 30 arrests per day for saying things the government don't like or that are politically incorrect, is it? It's mostly for things that rise to the level of threats or harassment or cause alarm.
On the one hand it's a new conduit for threatening conduct, and on the other hand, it's probably replacing some.
I'd note something that comes up when this number is mentioned often enlightens the context: that people often use this figure to say "that's more than in Iran or Russia", as if the number itself is actually meaningful. Nobody's going to arrest you in Russia for abusing transgender people; nobody's going to arrest you in Iran for encouraging the punishment of promiscuity or gay people. In either case they might turn a blind eye if you threaten the lives of those people. But the things they would arrest you for — criticising the government or the war — you know not to even say out loud when not among friends. Because the punishment is not the mild inconvenience you would get in the UK.
There are bigger problems in the UK with misunderstanding policing of speech in the real, physical world: the Palestine Action stuff is being much more obviously mishandled. I think it's much more important to focus on getting the government to handle that more logically and sanely.