[Serious] Generally speaking, is philosophy a worthwhile subject of study?

[vulcanlogician]

What goads us into regarding all philosophers with an equal measure of
mistrust and mockery is not that we are struck repeatedly by how innocent
they are – how often and easily they err and stray, in short, their childish
childlikeness – but rather that there is not enough genuine honesty about
them: even though they all make a huge, virtuous racket as soon as the
problem of truthfulness is even remotely touched upon. They all act as if
they had discovered and arrived at their genuine convictions through the
self-development of a cold, pure, divinely insouciant dialectic (in contrast
to the mystics of every rank, who are more honest than the philosophers
and also sillier...): while what essentiallyhappens is that they take
a conjecture, a whim, an “inspiration” or, more
typically, they take some fervent wish that they have sifted through and
made properly abstract – and they defend it with rationalizations after
the fact. They are all advocates who do not want to be seen as such; for
the most part, in fact, they are sly spokesmen for prejudices that they
christen as “truths” – and very far indeed from the courage of conscience
that confesses to this fact, this very fact; and very far from having the good
taste of courage that also lets this be known, perhaps to warn a friend or
foe, or out of a high-spirited attempt at self-satire.