You may find your business partner, get your dream job, or meet your spouse by chance. But ascribing all fortuities to luck alone is not complete.
You can increase the chance of having more lucky meeting encounters by networking a lot.
You can increase the chance of getting your dream job by routinely scouring job openings and preparing yourself for the job way earlier.
You can increase the chance to discover a suitable romantic partner if you meet more new people.
No action equates to no chance. You will be luckier than most when you do something to exploit opportunities.