I wanted to interject about how "ecosystem" is a word only used for locked-in stuff like Apple and Google, but y'know what?
THIS is a proper ecosystem. It is actually organic, made of independent moving parts, unlike the clockwork made by big tech, internal to each and to a large extent indivisible.
ToS are legalese bullshit. They mean next to nothing since most stuff if it comes to court, gets annuled.
ToS kind of does protect you, but holding tge service hostage or not (as in you can't watch one little youtube video without selling your soul to Google) doesn't make a big difference - rrasonable expectations are that users own their content (as is the case in youtube's case - youtube doesn't ponce on your videos afaik), although they do own rights to distributing it (obviously), and using sane technological measures to prevent what they don't want. In youtube's case that's watching e.g. privated videos, and in another case it can be AI scrapers.
Robots.txt is, just like a ToS, a contract. It just isn't legalese as it isn't meant to scare people, but be useful to programmers making the site and those using the scraper. They're programmers, not marketers or lawyers, of course they won't deal with legalese if they csn avoid it.
Again, law is not leagese.
A robots.txt file is a contract by use,like when you park in a charge zone - entering the zone, you accept the obigation to pay.
When you scrape a site you first check for robots.txt in all the reasonable places it should be, look for its terms, and follow them... If you don't want to riskgetting sued.
Similarily, entering a store, you are expected to pay for what you take. There is no entry machine like on a metro where you, instead if swiping a card, read the store's T&C's, but know that it's common sense security will come after you, if not the police. Yet you clicked no "I agree"? How come you don't just take what you want?
And robots.txt is a mature technology and easily a "standard". Any competent lawyer will point that out to the jury and judge, who will most likely rule appropristely. The Internet is not the Wild West anymore.