Do you think all courses are Useless?

Yes i 100% agree that courses are useless in comparison to the gems we found here or on other forums but to be fair too not all the information can be found here i learned some high quality stuff on some courses,blogs not experienced stuff like M/s (i think if i relied only on course i will not even know if M/s exist lol ) but some cool thing like for example how the algorithm work for Growth how can one video work and other not… And not all of that is disscussed on forums (maybe level 2,3)

Do you have some reliable real killers of SM that are not willing to just take your money but help you on experienced stuff (noy necessery blackhat stuff like all the method we discuss here but some stuff that can help you interstand more how things work overall and some little private tricks for growth hack)