I doubt it is irreversible, but I guess we disagree on the use of jail. I personally think jail should be for violent people and people that are harmful to society.
I see you could argue the second, but I find it overkill. I’d much rather see that an offence like this is punished with service to society.
If you really want to deter him and other people from doing it again, chop of his hand and stick it on a pike near the crime…
The whole “punish someone with jail and make it as miserable as possible” is something I associate with 3rd world countries, dictatorships and the US.
I’d much rather people like this are taught a resonating message using the right community service that also saves on taxpayer money and not cost 280 a day (or over 100K for your suggested 1 year revenge scentence).