According to Line 1 and Line 10 of the poem, it can be inferred that Icarus is better off testing his limits, a feat he must embark on in order to discover his abilities instead of wondering somewhere years later what would have been.
The first opens with a question asking to know what else the boy could have done
in the tenth and opening of the eleventh line, he alludes that the boy flew exactly to the point of wisdom;
Following through on that, the remainder of the eleventh and twelfth line rejects the notion of living in ignorance of ones capabilities and possibilities;
The confirmation that Icarus now knew his strengths, weaknesses and capabilities is easily rested with the eighteenth line.