It is part Ayn Rand, part Curtis Yarvin. Ultimately it all comes from Thomas Carlyle anyway.
And there is no need to limit yourself to potential obligations. Unless you have an exceedingly blessed life, then there should be no shortage of friends and loved ones in need of help.
A messy onset featuring transient beating caused by a piano key being out of tune with itself is usually insignificant, but it is not necessarily insignificant if it occurs during a mellow, legato passage, where that particular note plays an especially central role. It can ruin the phrase completely. Still only in the ears of skilled musicians, but if you say this is unimportant because skilled musicians are vastly outnumbered by the general population, then you wind up creating a strong disincentive from advancing in skill beyond a certain point, and you wind up giving least consideration to those people who have most to do with music.
Not equally so, but moreso. Singing, dancing, figure skating, etc. are the highest performance arts because less mediated. They place greater psychological demands on the performers; strain their spirits to the utmost. There is something divine in it, to a degree beyond the divinity in instrumentalism. The emotional depth is greater because the performer needs by necessity to embody the emotions, and is faced with the audience without the protection of an instrument in the way. Psychologically it is a different caliber of performance. Even the greatest concert pianists (Horowitz, for example), can never quite match the olympian quality of the greatest singers.
And for that reason, you would be among those harmed if quality distinctions were eroded in rock and roll. Popular audiences who have only a transient interest and might switch to Billie Eilish the next day will not love rock and roll the way you do, and so they will not care if good rock and roll becomes replaced with total garbage that sounds superficially similar. They will not know the difference. You would, and you would mourn the loss, but when it comes to classical, you side with the unknowing masses, for all that they could just as well be kept occupied by any other entertainment. Netflix, for example.
This is a strange statement. Rock is much more monodic than common practice period music. Even music from the classical period, which basically invented monody, was more polyphonic than most rock.
High art (theatre in particular), is the centrepiece of just about every great civilisation in known history. The works of Aristotle, as they were preserved and studied by the Catholic church, were not what sparked the Renaissance. The humanistic works were.
The arts are connected and many things you take for granted (novels and rock music) could not have arisen except out of a canon with high art at its centre. Novels came out of chronicles and epics, and rock music features chords, which are not such an obvious idea as they might seem. Chordal music came very gradually out of a very long tradition of polyphonic choral music. The discovery of antique classics was what sparked the renaissance, so it should be obvious at a glance (or at the very least from Chesterton’s fence esque reasoning), that losing connection with that canon would be a very serious loss.
Edited to add:
Incidentally, I think it’s only intellectuals who would question the value of exquisite quality and the fine discernment of a skilled craftsman. To regular people, the value of these would be obvious. It is precisely to intellectuals that it is not obvious.