This has little to do with whether you curate. That's a whole different discussion about optimizing for cost, where many many terabytes eventually make LTO become cheaper. When we're specifically looking at reliability for important files, there might only be one tape's worth of data. It's a $3000 fee to make that tape (and its backups) last a long time in storage, and having more or less data barely affects the price.

Using LTO specifically for the purpose it was designed for is the exact opposite of insanity.

You presume the things I want to save aren't individually TiBs in size.

Anyone who has even an amateur interest in, say, making movies, probably has at least a few projects worth of 4K RAW footage they would hope outlives them. (And the average small-time YouTube content creator has far more.)

I don't know, i don't think any one after me is gonna scrounge through hours of raw footage of an old project of some grandparent (me). Not that I have kids but anyway.

If anything I doubt they'll bother looking at the final cut.