no 90$ for an item that doesn't even 15$ to make is not a reasonable price !
This has been a problem for more than 10 years and Apple's never done anything about it. I can only imagine it's because they think the strain relief is ugly, which is one of those random bits of belligerent incompetence that's really frustrating as a Mac fan.
It may depend on the conditions you use them in; keeping it on your desk most of the time is probably better than carrying it around and using it in coffee shops and so forth. But that's a standard use case for laptops; there's no excuse for not being able to survive that.