Why should the meaning of life we choose for ourselves be a delusion?
I get the point that this meaning is arbitrary (in the sense that it has no ground since the world is absurd).
But as long as this meaning works for you, who cares if others find it meaningless?
Loneliness may be an issue though, but this is where the internet, among other ways, makes a difference. You can look for like-minded people or
publish your work, your project, your ideas to attract people interested.
Some just can't stand a meaning world, but many as I consider this lack of meaning as a requirement for our freedom.
I'm an atheist ; the absurdity of the world appeared to me at an early age - as an experience than my body can feel, an emotion, that only my mind made a rationale of.
However, raised in an open-minded but deeply Catholic family, the Bible points that very clearly. God is said to have given humans the freedom to choose to follow the path of Jesus. Or not.
Faith implies doubt, by definition. Having faith is not to be absolutely sure of the existence of God. Faith is hope despite the doubt, and God asks of the believers their fortitude in their faith into Him.
The "ultra" believers, those who have no doubt, are not "in the faith". They are usually fanatics, those kinds of people who think they are always right and want others to be like them.
It's like courage: being courageous means going over our fears. If you have no fear to handle in doing something, then your courage is not tested.
If you have no doubt whatsoever in the meaning of life, you are either a fanatic (whatever you do, some are moneymaking fanatic, fame-fanatic, power-fanatic or racist misogynist incels, hate also provides meaning, onviously) or someone who avoid at all cost to face the absurdity of the world.
For example, I have close friends who are always super busy. If they have half an hour of free time, they feel bad: they feel an emptiness that they can't bare.
The world is absurd? Great, we are totally free to give ourselves the meaning we want to our life! Isn't that amazing?
Find your crowd! They are people out there sharing your meaning of life. Create a community of intention, so that you live in the world you want.
"Become who you are".
I'm not saying it's easy, and not everybody is in capacity to be free. But most educated people are, if they want to. But acting freely requires courage, much more than succeeding in the career and the way of life the society wants you to.
That meaning of life that works for you doesn't have to be "for life". One path may prove less meaningful that expected. Loving to dev on projects you want to work on is meaningful to many. Having a well-paid job as a developer can be utterly meaningless: hence the so many side-projects to retrieve a bit of spontaneous enthusiasm whike coding.
Sometimes, what has been meaningful for years is not anymore. Many men live that during their 40s, the so-called " mid-life crisis". Or you are done, that meaning doesn't work anymore. So what? Is it lost? No! As long as you had meaningful years, that's a huge win. Just time to move on and explore another part of yourself or becoming someone else.