It is not necessary to know or to hypothesize the real motivations that pushed an author to compose a certain passage, but to enter the spirit of the work.
The attack of Chopin's Second Piano and Orchestra Concerto begins with a seventh chord on the second grade of minor, a rare chord that Chopin also uses elsewhere, for example in the attack and in the final cadence of the first Scherzo.
It is a chord that expresses anguish.
What anguish could the nineteen-year-old Chopin experience at a time when, as soon as he played in Vienna, he was coming back from a good success?
At that time Chopin had to go abroad to establish himself; his father had confidently asked the government to get a scholarship, but the application was rejected and he was forced to apply for a loan.
In Vienna, Chopin did not have much time to search for contacts and find opportunities to establish himself. His anguish could be derived from this, from being abroad, alone, and having to quickly make himself known to earn and help his father repay the debt.
Chopin not only spent everything he had, but he had to ask for additional help at home.
When he arrived in Paris for his debut, as no one paid attention to him, he had to organize a concert on his own, and he earned less than he had spent.
He had to ask for help at home and his mother broke the piggy bank where the savings of years were kept, and sent him everything she had ...