I'm not convinced that error reads on blu ray media is worth bothering about. Do your disks play properly, yes or no? Do a TRT scan if you must, then check it again sometime later, but stop fussing and fuming about this stuff.
If you're really worried about data loss, wait until the M-discs are released in 25gb format. Those should be about $18 a disk, or more.
Blu ray burning is a niche market. It will never get very popular, due to the cost of the media, the small sizes of data that can be put on them and the ever increasing opinion that optical storage is a thing of the past. Once the price of SSD's and portable flash comes down to a reasonable level for ~100gb size, optical data storage is going down the tubes in a hurry. We've already seen a drastic change in storage habits for many when regular hdds were cheap, and that will come back once hdd production recovers to previous levels.
So what does that leave? Blu ray video. If you want backups of blu ray video on more than one type of storage, blu ray disks are useful. Maybe not completely necessary, but it gives you a way to store video that you may have compressed to smaller sizes. If you lose a storage hdd and haven't been too careful in backing it up, the blu ray disks are one relatively quick means of getting everything running again.