This is an unpersuasive argument because it ignores all the computer users who are not "members". Whether or not "members" trust LinkedIn should have no bearning on whether other computer users who may or may not be "members" can retrieve others' public information.
Even more, this statement does not decry so-called scraping only "unauthorised" scraping. Who provides "authorisation". Surely not the LinkedIn members.
It is presumptuous if not ridiculous for "tech" companies to claim computer users "trust" them. Most of these companies recieve no feedback from the majority of their "members". Tech companies generally have no "customer service" for the members they target with data collection.
Further, there is an absence of meaningful choice. It is like saying people "trust" credit bureaus with their information. History shows these data collection intermediaries could not be trusted and that is why Americans have the Fair Credit Reporting Act.