What makes it financial data as opposed to data storage? Interpretation.
You call it data storage because you don't like the tech stack being built on top of it. I call it financial data because I see the use case and I embrace it.
At the end of the day it's all zeros and ones. Data it still is.
What you're calling "data storage" is simply more financial data but in a different format.
You just don't like that it's not a standard bitcoin transaction, even though such transactions follow all consensus rules just fine.
Permissionless, remember? Anyone can use the network. They don't require anyone's blessings to do so. As long as they follow the consensus rules. Which those transactions you don't like do.
Free markets, remember? DeFi has immense adoption, why do you think that is? Are you smarter and more enlightened than the free market?
And now bringing this to Bitcoin has - outside of maxi circles - pretty strong promise and interest - so again, do you know better than the market? It's only free markets until you disagree with the outcome?
Censorship resistant, remember? And yet there are the detractors coming up with new and inventive ways to censor the things they don't like.