Doing hard work may not necessarily be able to achieve what we want, but it is through hard work that our desires can be achieved and we must do it based on what we already know, don't do work that we don't fully understand, of course in this case we won't be able to achieve what we want. Doing work based on the knowledge we have consistently and asking for luck will certainly achieve the success we want.
Hard work is a necessary part of business and is very important for everyone who wants success, even though after working fairly consistently there is no guarantee of immediate success because it is still hampered by the level of luck that each person obtains. But basically everyone doesn't have to stop working and learning about what they don't know and what they already know, because that is a basic effort that must be done by everyone who wants success.
You are right that everyone goes through a different process in achieving their success and there are those who are able to get back up after they experience failure and correct their mistakes so as to achieve success and there are also those who are unable to get back up after they fail.
This is also caused by the different levels of ability of each person when it comes to rising from the adversity they have experienced. Because if you see someone who is unable to rise from adversity, in fact someone who is down is not unable to rise again from his failure, but he also needs time to enable himself to continue to rise from that failure. Meanwhile, some people who are immediately able to get up immediately after failure are people who basically may have more support from other parties so that there is some kind of help that they immediately receive in the near future. So you should also be able to see a little difference in someone's rise from failure.