This is particularly surprising to me also, for a different reason. Since Musk was a key player at PayPal, he should have learned that although the vast majority of users are well-intentioned and harmless, there are a small group of scammers and criminal who MUST be dealt with or they will rapidly bankrupt you.
On Twitter, we must add to the list of scammers & criminals the additional bots, trolls, and pranksters, all of whom can rapidly destroy trust in a community (online or off).
Why he didn't carry that lesson forward to this platform is baffling (unless he's in a contest with Kanye and the FTX crypto guy to see who can create the largest and most rapid-burning money bonfire).