I use ecc ram now and I think it's the proper way to do zfs, but let's not pretend you forfeit your data by not using ecc.
2tb is not a lot of data you would need to fill the drive 4 times a day before you would get close to hitting the single bit error rate, a pool of my size is guaranteed to hit that error rate just because of the volume of data.
If we are talking about running zfs on a desktop then yea you are right you don't need ECC, but if you are running a storage server for data you want to keep then you absolutely do.
But from all filesystems ZFS works best of all when you do not have ECC RAM.
The 'requirement' that ZFS needs ECC RAM to work properly is one of the biggest myths of the Internet ...