depending on who replied....on this "really help a lot"
without referencing to which investment topic and by who, and with period of time....
just use this as a guide....

does what our parent taught us really help a lot in our current life?
does what our teachers/lecturers taught us really helped in our work?
does what we see in youtube taught us really helped a lot in our knowledge?

just curious, how a lot is really a lot?

just like sex,...one really have to go into it hands on to really have the "experience" to see and feel that environment, process and resources used, whether one is really enjoying that "investment", with consideration to the risk, time and effort spend on that.

no gurus or books can teach you that "feelings", one just got to go experience it.