I was speaking to someone for whom English was a second language. They spoke it well, but they said: “My English is not perfect”. I replied: “It is not imperfect either”, and they agreed.
Why focus on the imperfections and make unnecessary excuses when there are plenty of perfections to focus on? Acknowledge and accept your abilities and you’ll strengthen them. Focus on the faults and you’ll feel you are failing.
Besides, modesty is charming, but gratuitous self-effacement is a pain.