Agree on letting it sort itself.
But no, you can easily soft fork em out by taking out the witness discount, or limiting witness size per tx, or enforcing a witness/nonwitness ratio requirement. No hard fork needed at all.
Discussion
How would those options prevent ordinal?
Ordinals have nothing to do with what we're talking about.
Inscriptions are.
And this wouldn't prevent them, it would just make them a lot more cumbersome and expensive - eliminating the current issue of arbitrary witness data storage being more financially incentivised (by lower fees) than normal transactions (vb for vb).