Regarding [遇到困難，假如能夠當下得到協助，該有多好啊!但遇到困難，也需自己願意提出問題，別人才能適時地提供協助。]because you do pay the tuition, thus I can be of help. However, who'd help you in the future? Thus, that's not the key point of learning to be a researcher.
Indeed, I may not have the teachers helping out in the future. So, I should only keep resolving the questions by myself, or talk to colleagues or firends who may be the experts in that field.