Or... They do what they did last time the lifetime was cut down from 3-10 years down to 395 days... Just issue you a new certificate when the old one runs out and up to whatever the time period you bought it for...?
Let's Encrypt isn't the only CA to use ACME, you can auto renew with basically any CA that implemented it (spoiler: most of them have)
Confirmation of anecdotes or gut feelings is still science. At some point you need data rather than experience to help people and organizations change their perception (see: most big tech companies lighting billions of dollars on fire on generative AI).