Earlier quoted context omitted.
> Saying that the work could not have been done without it is basically admitting that you got papers outside the subscriptions of your institution. Not really. It could also mean: Scihub offers an efficient way to explore scientific articles, and without it, I (the scientist) wouldn't have bothered with all the different paywalls to even check if papers were worth reading. And as such, I would not have reached the s…
It does not make the work possible, though. Just more convenient.
After a certain limit, they will go into "I will invent it myself" mode.
And here is a different argument. Scientists often have brilliant moments while e.g. showering. So they could have written: "this work would not have been possible without showers". The statement itself does not imply anything about whether they paid for the water or not. Or even if they took a shower. Perhaps the thought of a shower triggered the eureka moment.