Yes, Google deserves to be distrusted and avoided as a whole, but Google Scholar is a genuinely net good for humanity.
replies(3):
Gmail is unlikely to let spam through.
But that doesn't make its spam filter great; it's also very prone to blocking personal communication on the grounds that it must actually have been spam. The principle of gmail's spam filter is just "don't let anything through".
It would be much better to get more spam and also not have my actual communications disappear.