Then why did the Buddha leave his lay life and became a mendicant? I think you should look more closely in and go back to why you asked your question. This is just my opinion but what you’re implying is completely going the other way where the Buddha is pointing to, which is renunciation.
Numerous times it’s mentioned in the suttas that lay life is crowded and one can’t practice and purify themselves as pure as ‘a polished shell’.
Numerous times it is mentioned that a disciples knowledge and wisdom is from the Buddha. So why deviate from his teachings when it is guaranteed that even if you don’t attain Nibbana in this lifetime, it is guaranteed you will enjoy a good rebirth when you follow and practiced the path in accordance with the Dhamma to the best of your abilities? The Buddha has left us the greatest teaching out of great compassion because he saw the truth of suffering.
I just can’t see an arahant going back to lay life. That being has let go of everything and the very purpose of her/his existence is to guide others to the same path s/he took to get there. It’s just mind boggling to me, why someone whose let go of all suffering, will go back into the midst of
suffering. It’s like being cured of poison, only to stupidly go back and drink poison again knowing that it is deadly and painful. Or pardon the grossness, it’s like stepping into really putrid excrement and washing off your feet really good only to go back and intentionally stepping again into even more putrid excrement? I have yet to taste even the first jhana, but the little stillness I get from my meditations and from observing my mind and seeing how indeed I am “afflicted” makes me yearn for what the suttas describe as “abiding in the here in now with the mind freed from the taints”! I can only imagine how that feels like. No more thinking, no more worries, no more bodily aches, no more underlying tendencies,and no more conflicts just to say a few! Must be really outta this world kind of feeling that no conventional words could ever describe!
Maybe I’m just slow, so please forgive.
May you one day, with the support of your practice and caga, be one who says "Free at last! Free at last! Free at last! I really wish you that with a sincerity. Because, the Buddha, who is our greatest kalyanamitta, gave us the greatest gift of all, the path to liberation and the deathless.
May your mind be free!