The only way to 'avoid the cascade' is by not writing #CSS. Every web style, no matter how or where we write it, participates in the cascade.
CSS wouldn't even be possible without a cascade of some kind. Since it's possible to write conflicting styles, browsers need some way to resolve those conflicts. That's all the cascade is.
We can imagine different rules for that process – what we have now wasn't the original proposal, & we've made updates recently – but there has to be something.