I recently saw a great video https://www.bankinfosecurity.com/how-to-fight-check-fraud-look-beyond-technology-a-21299?rf=2023-02-27_ENEWS_SUB_BIS__Slot1_ART21299&mkt_tok=MDUxLVpYSS0yMzcAAAGKMqJfI2i87GCnqQPTeoRoYMCf1EEHC1AJ4qh708AIYOhT0Q8JFA_5fWC2pELiMEUqWwUPXl7I0l13QQJQKJapHyHw3oF_eWabtx5ta8nuZ8aR4A by Karen Boyer, Sr. VP of M&T Bank on how to fight check fraud, a topic that I recently addressed. However, the problem that she addressed was not so much "check fraud" as frauds involving checks.
I see two different problems here, and faster reversibility is not addressing either. First is stolen legitimate checks deposited to fraudulent accounts. This is a classic "know your customer" problem. This problem is aggravated by the banks' desire for new accounts and initial deposits. One can set up an account, deposit a stolen check to it, and transfer or withdraw the funds, all without ever having gotten close to a bank officer or even a human, non-automated, decision.