Competent at doing what exactly? For example, you need cave-dive training to do cave-diving, and even with 1000+ dives you won't be a competent cave-diver. As another example, I've done lots of dives in murky low visibility, but little-or-no dives in the ocean, rivers, or currents.
Number of dives doesn't equate to competence either. Are you practicing skills? Challenging yourself (safely)? Pursuing training? Learning continuously? Diving doesn't have to be a "work your ass off and become a master" hobby, people can enjoy it casually and safely, without ever really pushing themselves, so long as they stay within their limits.
There's also a certain amount of natural affinity, or personal limitations. For example, people who panic easily might still not be really qualified for basic diving after 100+ dives, but someone who is chill and handles stress well might be able to be throw into all kinds of situations and sill mange just fine.
I'd like to think I have some competency in some areas, but also a lot of other areas I can improve, which that improvement will help me have better dives. For example, better finning technique.