Your use of the word "absurd" in the original title makes me wonder whether you've been exposed to 20th century nihilist philosophy.
"Absurd" comes from a Latin word meaning "dissonant" and it refers to the dissonance between man's expectations and his actual experience.
That's kind of cool (it's maybe the second noble truth) but it's still a description of the problem, and not of the solution.
Note that the Buddha spoke again both extremes: eternalism and nihilism.
I could try to suggest two remedies:
There are also some half-way measures, e.g. lay people visit or work with Sanghas.
Speaking from a general point-of-view, if a Buddhist knows that the lay life is not ideal, what barriers (overt and inconspicuous) are preventing them from seeking and living the monastical life.
This isn't quite what you were asking, but one answer is that to be accepted they might require you to be in reasonable health, and not too old (e.g. less than 50)
Also your basic question seems to be "why don't I act rationally?" Well that's a good question but maybe it's normal for human to have habits, including bad habits, and developing discipline and rationality and insight etc. is non-trivial.
There's a (non-Buddhist) poem addressed to Siva (named "Ramanatha" in the poem),
If this is my body
Would it not follow my will?
If this is your body
Would it not follow your will?
Obviously, it is neither your body
It is the fickle body
Of the burning world you made,
How can they be overcomed ?
There's a little voice in my head that replies, "First you must have that intention (to overcome them)."
I suppose a canonical answer is the "noble eightfold way" (see for example here and here): that's the path to liberation. You start with Right View (seeing your situation properly), then Right Intent (wanting to act appropriately for that situation), etc.
And even a little is better than none IMO: doing away with ill-will, intending to be harmless, etc.
You might like to read The Intention of Renunciation since that's what you seem to be asking about,
The Buddha does not demand that everyone leave the household life for the monastery or ask his followers to discard all sense enjoyments on the spot.
Maybe you don't want to lose happiness (by losing work, hobbies, social, etc.). Maybe a key then is to replace these forms of happiness, not with nothing but with other causes of happiness: e.g. equanimity (freedom), good will, etc.